It makes sense comparing Onkyo TX-NR797 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-NR797 has 9.2 versus 2.0 for Integra DTM-6. Regarding power, then TX-NR797 has such a W/Ohm ratio - 100/8, 220/6 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-NR797 and AK4438 384 KHz/32-bit for the DTM-6. Only the TX-NR797 supports Bi-amping feature. The Onkyo TX-NR797 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Rivals from our review have Bluetooth support. The Onkyo TX-NR797 has support for AirPlay, AirPlay 2, and its competitor in our comparison - AirPlay. Spotify can be used on each receiver. Deezer, TIDAL, Pandora, TuneIn Radio - all of these streaming services have found application in each of the models. Only the TX-NR797 provides HDMI signal transmission in standby mode. The TX-NR797 can scale the input HDMI signal, unlike the DTM-6. Dolby Vision technology found support only on the TX-NR797. Only the TX-NR797 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-NR797. These compared receivers have a built-in phono stage for connecting a vinyl player.
The TX-NR797 supports 3 Multi-room zones, versus 2 for the DTM-6. Supported voice control technologies are identical - Google Assistant. An ECO mode is not present in each of the AV receivers. The setup assistant will help you configure Onkyo TX-NR797.
Only the TX-NR797 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the TX-NR797.