Pioneer VSX-LX303 vs Yamaha RX-V4A comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Pioneer VSX-LX303 has 9.2 versus 5.2 for Yamaha RX-V4A. Regarding power, then VSX-LX303 has such a W/Ohm ratio - 100/8, 200/6 when RX-V4A has a power of 80/6. The THD is 0.08% for the VSX-LX303 but 0.06% for the RX-V4A. Both the VSX-LX303 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 VSX-LX303 has support for AirPlay, and its competitor in our comparison - AirPlay, AirPlay 2. Spotify can be used on each receiver. The VSX-LX303 can work with the audio stream from Deezer, TIDAL, Pandora, TuneIn Radio, 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 VSX-LX303 has 7/2 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 VSX-LX303 supports the protection of digital content of the standard HDCP 2.2, versus HDCP 2.3 in the RX-V4A. The VSX-LX303 has a built-in phono stage for connecting a vinyl player. The VSX-LX303 supports voice control via Google Assistant, and the RX-V4A - Amazon Alexa, Google Assistant, Siri. An ECO mode is only available for the RX-V4A. Both VSX-LX303 and RX-V4A can be configured using the Setup assistant.
Only the VSX-LX303 has a Dolby Atmos multichannel audio format support. A surround technology DTS:X is supported only by the VSX-LX303.