Onkyo TX-RZ3100 vs Denon AVRX6300H comparison definitely makes sense.
Considered AV receivers have the same number of channels 11.2. Regarding power, then TX-RZ3100 has such a W/Ohm ratio - 200/6 when AVRX6300H has a power of 140/8, 175/6. The THD is 0.04% for the TX-RZ3100 but 0.05% for the AVRX6300H.
Characteristics of digital to analog converter (DAC) are different, AK4490 384 KHz/32-bit for TX-RZ3100 and 192 KHz/32-bit for the AVRX6300H. Both the TX-RZ3100 and the AVRX6300H support Bi-amping. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Both models have the ability to connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. The Onkyo TX-RZ3100 has support for AirPlay, and its competitor in our comparison - AirPlay, AirPlay 2. Spotify can be used on each receiver. The TX-RZ3100 can work with the audio stream from Deezer, TIDAL, TuneIn Radio, and the AVRX6300H can receive a content from Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud. Compared AV receivers retain the quality of 4K/60Hz 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 AVRX6300H can scale the input HDMI signal, unlike the TX-RZ3100. The HDR standard - Dolby Vision is supported by these receivers.
The Onkyo TX-RZ3100 has 8/2 HDMI inputs/outputs versus 8/3 HDMI connectors of the Denon AVRX6300H. 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. An ECO mode is only available for the AVRX6300H. The setup assistant will help you configure Denon AVRX6300H.
Both devices have support for Dolby Atmos multichannel audio format. The surround sound technology DTS:X is supported by devices under review.