Marantz NR1508 vs Yamaha R-N803BL comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Marantz NR1508 has 5.2 versus 2.0 for Yamaha R-N803BL. Regarding power, then NR1508 has such a W/Ohm ratio - 50/8 when R-N803BL has a power of 100/8, 160/4. The THD is 0.08% for the NR1508 but 0.01% for the R-N803BL.
Characteristics of digital to analog converter (DAC) are different, 192 KHz/24-bit for NR1508 and ESS SABRE (9006AS) 192 KHz/24-bit for the R-N803BL. 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. Rivals from our review have Bluetooth support. The Marantz NR1508 has support for AirPlay, AirPlay 2, and its competitor in our comparison - AirPlay. Spotify can be used on each receiver. The NR1508 can work with the audio stream from Deezer, TIDAL, Pandora, and the R-N803BL can receive a content from Deezer, TIDAL, Pandora, Sirius XM.
Only the Marantz NR1508 has support for High dynamic range (HDR). Only the NR1508 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 NR1508. The HDMI Audio Return Channel (ARC) does not support any one of these models. Unfortunately, HDMI eARC is not available on monitored devices. Of the two receivers in our comparison, HDMI CEC is present in only the NR1508. The R-N803BL has a built-in phono stage for connecting a vinyl player. The NR1508 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 NR1508.
None of the rivals equipped with Dolby Atmos multichannel audio decoder. The receivers do not support the surround sound technology DTS:X.