The LG OLED65B7A and OLED65C7P have identical picture quality, meaning that the difference between the OLED65B7A and OLED65C7P is due to their design and audio capabilities. The two LG OLED TVs come in the 65-inch class, and are part of the B7A and C7P series, respectively.
Design: OLED65B7A and OLED65C7P have different stands; the bezel color is also different
The flat, dark base of the OLED65B7A is complemented by a pedestal made of clear plastic. This type of stand – the transparent pedestal in particular – allows the OLED65B7A to appear as if it is floating mid-air when mounted on a tabletop surface. The clearance beneath the screen is approximately 2 inches. On the other hand, the OLED65C7P has an aluminum stand that is in the form of a trapezium, meaning there is no dedicated pedestal. That being said, there is still some clearance beneath the screen: approximately 1.6 inches. When it comes to mounting your TV on a wall, both the OLED65B7A and OLED65C7P are compatible with the VESA 300×200 standard. Another difference between the two OLED TVs is the bezel color: it’s silver on the OLED65B7A, and black on the OLED65C7P.
Audio: OLED65B7A omits the Dolby Atmos decoder and the sub-woofers OLED65C7P is equipped with
The OLED65C7P has a 2.2 channel speaker system. The total audio power output is 40 Watts, half of which is allocated to the sub-woofers. On the other hand, the OLED65B7A has 4.0 channel speakers, meaning there is no dedicated sub-woofer. As a result, the bass is less pronounced on the OLED65B7A in comparison to the OLED65C7P. The OLED65B7A has a total audio power output of 40 Watts. Although both TVs have a built-in DTS-HD decoder, only the OLED65C7P has a Dolby Atmos decoder which allows sound tracks in this format to be played back via the TV’s internal speakers. The OLED65B7A lacks this ability. That being said, both the OLED65C7P and OLED65B7A can pass-through Atmos tracks (from streaming apps, cable/broadcast TV or USB flash drives) over HDMI ARC to a compatible receiver or sound bar. According to LG, the functionality to pass-through Dolby Atmos tracks from Blu-ray discs will be enabled via a software update.
Picture Quality: Identical between OLED65B7A and OLED65C7P for both SDR and HDR content
The OLED65B7A and OLED65C7P have an OLED panel with resolution of 3840×2160. OLED TVs have no backlight because they produce light on a pixel level. This leads to both the OLED65B7A and OLED65C7P having wide viewing angles, and being able to retain color vibrancy and image brightness even when viewed off-axis. Furthermore, individual pixels can be turned off to produce a perfect black level, with no light leakage from adjacent regions. As a result, the OLED65B7A and OLED65C7P can achieve an infinite intra-image contrast ratio which is immediately obvious in the image depth of any content you watch, be it Standard or High Dynamic Range. Some examples of SDR content are DVDs, Blu-ray discs and TV broadcasts. They typically adhere to the BT.709 color space. Since BT.709 is a relatively small color gamut, the OLED65B7A and OLED65C7P are able to fully cover it, thus they are able to reproduce all colors in SDR content without any tone-mapping. Although the OLED65B7A and OLED65C7P have an Auto Brightness Limiter that dims the screen based on the percentage that is lit (the larger that area is, the dimmer the TV gets), they can still reach approximately 150cd/m2 on a full-field white (100% window size) before the ABL is engaged. Since SDR is mastered to about 100cd/m2, you can watch hockey and skiing, or any other high APL (Average Picture Level) content without the OLED65B7A and OLED65C7P making any compromises with the light output. In other words, the OLED65B7A and OLED65C7P are able to achieve reference image quality with SDR content in a light controlled environment. That being said, the brightness headroom the OLED65B7A and OLED65C7P provide might not suffice in a setting with an excess of ambient light, but this issue affects only high APL content whereas for example most movies and TV shows have low to mid APL. Considering that the OLED65B7A and OLED65C7P can reach approximately 430cd/m2 with 10% and 25% APL content, you’ll be able to watch the vast majority of SDR content even under bright lighting conditions without either the OLED65B7A and OLED65C7P appearing too dim.
There is no difference in terms of the supported HDR formats between the OLED65B7A and OLED65C7P. For example, they both support Dolby Vision which relies on dynamic metadata in order to deliver optimal HDR picture quality by tone-mapping the 4,000cd/m2 content to the peak brightness the two OLED TVs are capable of. The light output in small specular highlights is identical between the OLED65B7A and OLED65C7P (barring some slight panel-to-panel variations). The two OLED TVs can reach up to 800cd/m2 in small areas of the screen (5% window size) provided the white point is set to D65. If you calibrate to D93 white point, for example, a higher peak brightness can be achieved but at the expense of the white color having a bluish tint. The OLED65B7A and OLED65C7P also support the HDR10 format which only includes static metadata for the entire content. This means that the HDR10 is only optimized for scenes with highlights whereas in the event only mid-tones and shadows are present in any given scene, they might be rendered slightly darker. On the one hand, the way OLED65B7A and OLED65C7P track the PQ (Perceptual Quantizer) EOTF, which is the transfer function used by HDR10, allows them to resolve detail in specular highlights up to 4,000cd/m2 but, on the other hand, the lack of dynamic metadata in HDR10 means that some scenes without any highlights will be rendered unnecessarily darker. In order to address this issue, both the OLED65B7A and OLED65C7P include Active HDR processing that analyzes content and generates dynamic metadata. Another HDR format that OLED65B7A and OLED65C7P support is HLG (Hybrid Log Gamma) which is intended mainly for future TV broadcasts in HDR.
The OLED65B7A and OLED65C7P cover approximately 99% of the DCI-P3 color gamut (for mid-tones and lighter shadows), which means that they are able to display vibrant and rich colors with HDR content. It needs to be said, though, that in specular highlights above 1,000cd/m2 the color gamut of the two OLED TVs is slightly more limited. But when you consider that only about 15% of the digital code words in the 10-bit HDR signal are allocated for specular highlights between 1,000cd/m2 and 4,000cd/m2, the impact that less than optimally saturated highlights on the OLED65B7A and OLED65C7P have on the overall image quality is fairly limited, depending on the preponderance of such specular highlights in the content you’re watching. Both TVs have 10-bit panels, meaning they are able to show smooth color gradients, without any banding.
Inputs and Smart TV are also identical between the OLED65B7A and OLED65C7P
There are 4 HDMI and 3 USB ports on each one of the two OLED TVs. However, there is a difference in terms where they are placed on the OLED65B7A vs OLED65C7P. For example, on the OLED65B7A the HDMI IN 1 and 2 are side-facing while the HDMI IN 3 and 4 are rear-facing. On the other hand, all HDMI terminals but the HDMI IN 4, which is rear-facing, are side-facing on the OLED65C7P. Additionally, the OLED65B7A has 1 rear and 2 side USB inputs. This order is reversed in the OLED65C7P, meaning there are 2 rear and 1 side USB ports. Other inputs that the two OLED TVs have in common are an Ethernet port, a RF In (cable/antenna), a Digital Optical Audio Out, a RS-232C (Mini jack), and a Composite In. Both the OLED65B7A and OLED65C7P are equipped with the webOS Smart TV system and pack the Magic Remote Control.
Motion and Input lag are similar as well
Both the OLED65B7A and OLED65C7P have nearly instantaneous pixel response time due to being OLED TVs. This means that pixel transitions are completed before the next refresh cycle which happens every 8.3ms in TVs with a 120Hz native refresh rate such as the OLED65B7A and OLED65C7P. This allows the two LG OLED TVs to avoid blurring and ghosting artifacts during fast motion sequences. Therefore, the OLED65B7A and OLED65C7P handle motion equally well. In terms of gaming, the input lag is relatively low at approximately 21ms so there is a minimal delay between your input and the action taking place on the screen.
Image retention: The OLED65B7A and OLED65C7P employ the same mitigation techniques
After every few hours of usage, the OLED65B7A and OLED65C7P automatically perform a measurement of the current flowing through their pixels at different voltages, and accordingly compensate for any irregularities that may present themselves as either a non-uniform luminance distribution, or – in severe cases: image retention. Besides relying on the automatic measurement and offset process, you can manually start a compensation cycle that is considerably longer than the automatic one since it lasts for more than an hour. This means that it’s more effective in clearing image retention, should your OLED65B7A or OLED65C7P ever experience one, but you won’t be able to use your TV until it’s completed. You can start the Pixel Refresher either immediately, or after the TV is off. Both the OLED65B7A and OLED65C7P have this feature under OLED Panel Settings. There, you can also find the Screen Shift option. It is used for moving the picture by few pixels at given intervals in order to prevent image retention from occurring in the first place.