The Onkyo TX-NR555 vs Yamaha R-N602 comparison proves that these receivers have many common features.
A significant difference between the receivers in the number of channels, Onkyo TX-NR555 has 7.2 versus 2.0 for Yamaha R-N602. Regarding power, then TX-NR555 has such a W/Ohm ratio - 130/6 when R-N602 has a power of 80/8, 105/4. The THD is 0.08% for the TX-NR555 but 0.04% for the R-N602.
Characteristics of digital to analog converter (DAC) are different, Hi-Grade 384 KHz/32-bit for TX-NR555 and Burr-Brown 192 KHz/24-bit for the R-N602. Only the TX-NR555 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-NR555 can work with the audio stream from Deezer, TIDAL, Pandora, and the R-N602 can receive a content from Deezer, TIDAL, Pandora, Sirius XM, Napster.
Only the Onkyo TX-NR555 has support for High dynamic range (HDR). Only the TX-NR555 provides HDMI signal transmission in standby mode. Both competitors are not able to scale the HDMI signal. The HDR standard - Dolby Vision is not supported by these receivers. Only the TX-NR555 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-NR555. 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. Unfortunately, the setup assistant is not available in each of the models.
Only the TX-NR555 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the TX-NR555.