The Onkyo TX-RZ630 vs Onkyo TX-NR797 comparison proves that these receivers have many common features.
Considered AV receivers have the same number of channels 9.2. Regarding power, then TX-RZ630 has such a W/Ohm ratio - 90/8 20Hz-20KHz, 215/6 1KHz when TX-NR797 has a power of 100/8 20Hz-20KHz, 220/6 1KHz. The THD is the same and is 0.08%.
Competitors' digital to analog converter (DAC) is identical to AK4458 384 KHz/32-bit. Both the TX-RZ630 and the TX-NR797 support Bi-amping. 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 Onkyo TX-RZ630 has support for AirPlay, and its competitor in our comparison - AirPlay, AirPlay 2. Spotify can be used on each receiver. The TX-RZ630 can work with the audio stream from Deezer, TIDAL, Pandora, and the TX-NR797 can receive a content from Deezer, TIDAL, Pandora, TuneIn Radio.
Both AV receivers support HDR10 technology (High dynamic range). Compared AV receivers retain the quality of 4K 60p signal when transmitting from a source to a TV or projector. HDMI signal transmission in standby mode is implemented in each of the devices. The TX-NR797 can scale the input HDMI signal, unlike the TX-RZ630. The HDR standard - Dolby Vision is supported by these receivers.
Each receiver has 7/2 HDMI inputs/outputs. The HDMI Audio Return Channel (ARC) feature supports both devices. Unfortunately, HDMI eARC is not available on monitored devices. The Consumer Electronics Control (CEC) feature is present in most modern AV receivers and the models in our comparison are no exception. Both models support the standard HDCP 2.2. These compared receivers have a built-in phono stage for connecting a vinyl player.
Each of the AV receivers from our review supports 3 Multi-room zones. Supported voice control technologies are identical - Google Assistant. An ECO mode is not present in each of the AV receivers. Both TX-RZ630 and TX-NR797 can be configured using the Setup assistant.
Both devices have support for Dolby Atmos multichannel audio format. The surround sound technology DTS:X is supported by devices under review.
The Onkyo TX-NR797 is better receiver in this comparison. Check Onkyo TX-NR797 price