It makes sense comparing Yamaha RX-V479BL vs Onkyo TX-8020 because they both are able to give some premium features.
A significant difference between the receivers in the number of channels, Yamaha RX-V479BL has 5.1 versus 2.0 for Onkyo TX-8020. Regarding power, then RX-V479BL has such a W/Ohm ratio - 80/8 when TX-8020 has a power of 90/6. The THD is 0.09% for the RX-V479BL but 0.03% for the TX-8020.
Competitors' digital to analog converter (DAC) is identical to 192 KHz/24-bit. None of the models support Bi-amping. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Only the Yamaha RX-V479BL can connect to the Internet via WI-FI. Only the RX-V479BL has Bluetooth support. The Apple Music service is implemented on considered devices: AirPlay. Competitors do not have built-in Spotify service.
HDR is not available on each model. Only the RX-V479BL provides HDMI signal transmission in standby mode. Both competitors are not able to scale the HDMI signal. The HDR standard - Dolby Vision is not supported by these receivers. Only the RX-V479BL 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 RX-V479BL. The TX-8020 has a built-in phono stage for connecting a vinyl player. A voice control is not available. An ECO mode is only available for the RX-V479BL. The setup assistant will help you configure Yamaha RX-V479BL.
None of the rivals equipped with Dolby Atmos multichannel audio decoder. The receivers do not support the surround sound technology DTS:X.