It makes sense comparing Onkyo TX-8020 vs Onkyo TX-8260 because they both are able to give some premium features.
Considered AV receivers have the same number of channels 2.0. Regarding power, then TX-8020 has such a W/Ohm ratio - 90/6 when TX-8260 has a power of 80/8, 160/6. The THD is 0.03% for the TX-8020 but 0.09% for the TX-8260.
Characteristics of digital to analog converter (DAC) are different, 192 KHz/24-bit for TX-8020 and AK4452 384 KHz/32-bit for the TX-8260. None of the models support Bi-amping. The Onkyo TX-8020 can transmit an audio signal directly to the amplifier and bypasses any DSP processing. None of the competitors supports Auto speaker calibration.
Only the Onkyo TX-8260 can connect to the Internet via WI-FI. Only the TX-8260 has Bluetooth support. The Apple Music service is implemented on considered devices: AirPlay. Only the TX-8260 supports Spotify.
HDR is not available on each model. Compared AV receivers are not able to transmit a 4K signal from the source to the TV or projector. HDMI signal transmission in standby mode is not supported by each device. Both competitors are not able to scale the HDMI signal. The HDR standard - Dolby Vision is not supported by these receivers. The HDMI Audio Return Channel (ARC) does not support any one of these models. Unfortunately, HDMI eARC is not available on monitored devices. The models in our review do not support the HDMI CEC function. These compared receivers have a built-in phono stage for connecting a vinyl player. A voice control is not available. An ECO mode is not present in each of the AV receivers. Unfortunately, the setup assistant is not available in each of the models.
None of the rivals equipped with Dolby Atmos multichannel audio decoder. The receivers do not support the surround sound technology DTS:X.
The Onkyo TX-8260 is better receiver in this comparison. Check Onkyo TX-8260 price