Marantz NR1508 vs Denon AVR-S940H comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Marantz NR1508 has 5.2 versus 7.2 for Denon AVR-S940H. Regarding power, then NR1508 has such a W/Ohm ratio - 50/8 when AVR-S940H has a power of 90/8, 125/6. The THD is the same and is 0.08%.
Characteristics of digital to analog converter (DAC) are different, 192 KHz/24-bit for NR1508 and 192 KHz/32-bit for the AVR-S940H. 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 Apple Music service is implemented on considered devices: AirPlay, AirPlay 2. Spotify can be used on each receiver. The NR1508 can work with the audio stream from Deezer, TIDAL, Pandora, and the AVR-S940H can receive a content from Deezer, TIDAL, Pandora, Napster, SiriusXM, TuneIn Radio, iHeart Radio, Sound Cloud. 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. The AVR-S940H can scale the input HDMI signal, unlike the NR1508. The HDR standard - Dolby Vision is supported by these receivers.
The Marantz NR1508 has 6/1 HDMI inputs/outputs versus 8/2 HDMI connectors of the Denon AVR-S940H. Only the AVR-S940H supports HDMI Audio Return Channel (ARC). Unfortunately, HDMI eARC is not available on monitored devices. The Consumer Electronics Control (CEC) feature is present in most modern AV receivers and the models in our comparison are no exception. Both models support the standard HDCP 2.2. The AVR-S940H has a built-in phono stage for connecting a vinyl player. Supported voice control technologies are identical - Amazon Alexa, Google Assistant, Siri, Josh.AI. It is also worth noting that the ECO mode is presented in each of the receivers. Both NR1508 and AVR-S940H can be configured using the Setup assistant.
Only the AVR-S940H has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the AVR-S940H.