It makes sense comparing Marantz NR1509 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, Marantz NR1509 has 5.2 versus 2.0 for Onkyo TX-8020. Regarding power, then NR1509 has such a W/Ohm ratio - 50/8, 60/6 when TX-8020 has a power of 90/6. The THD is 0.08% for the NR1509 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 NR1509 has Bluetooth support. The Marantz NR1509 has support for AirPlay, AirPlay 2, and its competitor in our comparison - AirPlay. Only the NR1509 supports Spotify.
Only the Marantz NR1509 has support for High dynamic range (HDR). Only the NR1509 provides HDMI signal transmission in standby mode. Both competitors are not able to scale the HDMI signal. Dolby Vision technology found support only on the NR1509. Only the NR1509 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 NR1509. These compared receivers have a built-in phono stage for connecting a vinyl player. An ECO mode is only available for the NR1509. The setup assistant will help you configure Marantz NR1509.
None of the rivals equipped with Dolby Atmos multichannel audio decoder. The receivers do not support the surround sound technology DTS:X.
The Marantz NR1509 is better receiver in this comparison. Check Marantz NR1509 price