Having had an opportunity to test Sony STR-ZA810ES vs Yamaha R-N602BL, I’d like to share my impression here to facilitate your choice of a new AV receiver.
The number of channels for receivers is different - 7.2 versus 2.0, respectively, for devices. In terms of power, there are differences, the STR-ZA810ES has such a ratio W/Ohm - 100/8, while the R-N602BL has a power of 115/8, 105/4. The value of total harmonic distortion is also different, and for the STR-ZA810ES it is 0.09%, but for the R-N602BL it is 0.01%.
The manufacturer installed different DACs, the STR-ZA810ES received the model 384 KHz/32-bit, but the R-N602BL is equipped with Burr-Brown 192 KHz/24-bit. The Bi-amping function is implemented only in the Sony STR-ZA810ES. Both Sony STR-ZA810ES and Yamaha R-N602BL can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Wireless Internet access via WIFI is possible on both units. Each of the receivers has a Bluetooth connector. Both devices can work with such Apple Music services: AirPlay. Access to the Spotify service is on each of the competitors. HDMI signal transmission in standby mode can provide only the STR-ZA810ES. Video scaling is only possible with the STR-ZA810ES. Operation with the Dolby Vision is only possible with the STR-ZA810ES. HDMI Audio Return Channel is only available on Sony STR-ZA810ES. HDMI eARC is only supported by the STR-ZA810ES. When comparing receivers, it becomes clear that only the Sony STR-ZA810ES has HDMI CEC. In the presence of a built-in phono stage for connecting a vinyl player only at Yamaha R-N602BL. There is an ECO mode in R-N602BL. The Sony STR-ZA810ES can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the STR-ZA810ES. Only in the STR-ZA810ES realized a DTS:X surround technology.