Onkyo TX-RZ820 vs Yamaha R-N803BL comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Onkyo TX-RZ820 has 7.2 versus 2.0 for Yamaha R-N803BL. Regarding power, then TX-RZ820 has such a W/Ohm ratio - 160/8 when R-N803BL has a power of 100/8, 160/4. The THD is 0.08% for the TX-RZ820 but 0.01% for the R-N803BL.
Characteristics of digital to analog converter (DAC) are different, AK4458 384 KHz/32-bit for TX-RZ820 and ESS SABRE (9006AS) 192 KHz/24-bit for the R-N803BL. Only the TX-RZ820 supports Bi-amping feature. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Rivals from our review have Bluetooth support. The Apple Music service is implemented on considered devices: AirPlay. Spotify can be used on each receiver. The TX-RZ820 can work with the audio stream from Deezer, TIDAL, and the R-N803BL can receive a content from Deezer, TIDAL, Pandora, Sirius XM. Only the TX-RZ820 provides HDMI signal transmission in standby mode. Both competitors are not able to scale the HDMI signal. Dolby Vision technology found support only on the TX-RZ820. Only the TX-RZ820 supports HDMI Audio Return Channel (ARC). Unfortunately, HDMI eARC is not available on monitored devices. Of the two receivers in our comparison, HDMI CEC is present in only the TX-RZ820. These compared receivers have a built-in phono stage for connecting a vinyl player. It is also worth noting that the ECO mode is presented in each of the receivers. The setup assistant will help you configure Onkyo TX-RZ820.
Only the TX-RZ820 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the TX-RZ820.