It makes sense comparing Marantz SR5012 vs Yamaha RX-V485 because they both are able to give some premium features.
A significant difference between the receivers in the number of channels, Marantz SR5012 has 7.2 versus 5.1 for Yamaha RX-V485. Regarding power, then SR5012 has such a W/Ohm ratio - 100/8 when RX-V485 has a power of 80/8, 145/6. The THD is 0.08% for the SR5012 but 0.09% for the RX-V485.
Characteristics of digital to analog converter (DAC) are different, 192 KHz/24-bit for SR5012 and Burr-Brown 384 KHz/32-bit for the RX-V485. Both the SR5012 and the RX-V485 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 Apple Music service is implemented on considered devices: AirPlay, AirPlay 2. 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 RX-V485 can receive a content from Deezer, TIDAL, Pandora, Napster, SiriusXM. Compared AV receivers retain the quality of 4K/60Hz signal when transmitting from a source to a TV or projector. HDMI signal transmission in standby mode is implemented in each of the devices. Both rivals can scale the resolution of the incoming HDMI signal. The HDR standard - Dolby Vision is supported by these receivers.
The Marantz SR5012 has 8/2 HDMI inputs/outputs versus 4/1 HDMI connectors of the Yamaha RX-V485. The HDMI Audio Return Channel (ARC) feature supports both devices. The HDMI eARC is available only on the RX-V485. The Consumer Electronics Control (CEC) feature is present in most modern AV receivers and the models in our comparison are no exception. The SR5012 supports the protection of digital content of the standard HDCP 2.2, versus HDCP 2.3 in the RX-V485. Receivers do not have a built-in phono stage for connecting a vinyl player.
Each of the AV receivers from our review supports 2 Multi-room zones. The SR5012 supports voice control via Amazon Alexa, Google Assistant, Siri, Josh.AI, and the RX-V485 - Amazon Alexa, Google Assistant, Siri. It is also worth noting that the ECO mode is presented in each of the receivers. Both SR5012 and RX-V485 can be configured using the Setup assistant.
Only the SR5012 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the SR5012.