It makes sense comparing Onkyo TX-RZ710 vs Integra DTM-6 because they both are able to give some premium features.
A significant difference between the receivers in the number of channels, Onkyo TX-RZ710 has 7.2 versus 2.0 for Integra DTM-6. Regarding power, then TX-RZ710 has such a W/Ohm ratio - 175/6 when DTM-6 has a power of 80/8. The THD is the same and is 0.08%.
Characteristics of digital to analog converter (DAC) are different, AK4458 384 KHz/32-bit for TX-RZ710 and AK4438 384 KHz/32-bit for the DTM-6. Only the TX-RZ710 supports Bi-amping feature. The Onkyo TX-RZ710 can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
WI-FI modules have the same characteristics: 2.4/5GHz. 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-RZ710 can work with the audio stream from Deezer, TIDAL, Pandora, Tunein Radio, and the DTM-6 can receive a content from Deezer, TIDAL, Pandora, TuneIn Radio.
Only the Onkyo TX-RZ710 has support for High dynamic range (HDR). Only the TX-RZ710 provides HDMI signal transmission in standby mode. The TX-RZ710 can scale the input HDMI signal, unlike the DTM-6. The HDR standard - Dolby Vision is not supported by these receivers. Only the TX-RZ710 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-RZ710. These compared receivers have a built-in phono stage for connecting a vinyl player.
Each of the AV receivers from our review supports 2 Multi-room zones. An ECO mode is only available for the TX-RZ710. Unfortunately, the setup assistant is not available in each of the models.
Only the TX-RZ710 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the TX-RZ710.