Marantz SR5012 vs Yamaha R-N803BL comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Marantz SR5012 has 7.2 versus 2.0 for Yamaha R-N803BL. Regarding power, then SR5012 has such a W/Ohm ratio - 100/8 when R-N803BL has a power of 100/8, 160/4. The THD is 0.08% for the SR5012 but 0.01% for the R-N803BL.
Characteristics of digital to analog converter (DAC) are different, 192 KHz/24-bit for SR5012 and ESS SABRE (9006AS) 192 KHz/24-bit for the R-N803BL. Only the SR5012 supports Bi-amping feature. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing. Rivals from our review have Bluetooth support. The Marantz SR5012 has support for AirPlay, AirPlay 2, and its competitor in our comparison - AirPlay. Spotify can be used on each receiver. The SR5012 can work with the audio stream from Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud, and the R-N803BL can receive a content from Deezer, TIDAL, Pandora, Sirius XM.
Only the Marantz SR5012 has support for High dynamic range (HDR). Only the SR5012 provides HDMI signal transmission in standby mode. The SR5012 can scale the input HDMI signal, unlike the R-N803BL. Dolby Vision technology found support only on the SR5012. Only the SR5012 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 SR5012. The R-N803BL has a built-in phono stage for connecting a vinyl player. The SR5012 supports voice control via Amazon Alexa, Google Assistant, Siri, Josh.AI, and the R-N803BL - Amazon Alexa, Google Assistant. It is also worth noting that the ECO mode is presented in each of the receivers. The setup assistant will help you configure Marantz SR5012.
Only the SR5012 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the SR5012.