Pioneer SC-LX801 vs Yamaha RX-V4A comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Pioneer SC-LX801 has 9.2 versus 5.2 for Yamaha RX-V4A. Regarding power, then SC-LX801 has such a W/Ohm ratio - 140/8, 200/6, 255/4 when RX-V4A has a power of 80/6. The THD is 0.08% for the SC-LX801 but 0.06% for the RX-V4A. Both the SC-LX801 and the RX-V4A support Bi-amping. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
WI-FI modules have the same characteristics: 2.4/5GHz. Rivals from our review have Bluetooth support. The Pioneer SC-LX801 has support for AirPlay, and its competitor in our comparison - AirPlay, AirPlay 2. Spotify can be used on each receiver. The SC-LX801 can work with the audio stream from Deezer, TIDAL, Pandora, and the RX-V4A can receive a content from Deezer, TIDAL, Pandora, SiriusXM, Qobuz.
Both AV receivers support HDR10 technology (High dynamic range). 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 Pioneer SC-LX801 has 8/2 HDMI inputs/outputs versus 4/1 HDMI connectors of the Yamaha RX-V4A. The HDMI Audio Return Channel (ARC) feature supports both devices. The HDMI eARC is available only on the RX-V4A. The Consumer Electronics Control (CEC) feature is present in most modern AV receivers and the models in our comparison are no exception. The SC-LX801 supports the protection of digital content of the standard HDCP 2.2, versus HDCP 2.3 in the RX-V4A. The SC-LX801 has a built-in phono stage for connecting a vinyl player. An ECO mode is only available for the RX-V4A. Both SC-LX801 and RX-V4A can be configured using the Setup assistant.
Only the SC-LX801 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the SC-LX801.