It makes sense comparing Yamaha RX-V377 vs Sony STR-DH590 because they both are able to give some premium features.
A significant difference between the receivers in the number of channels, Yamaha RX-V377 has 5.1 versus 5.2 for Sony STR-DH590. Regarding power, then RX-V377 has such a W/Ohm ratio - 100/8, 135/6 when STR-DH590 has a power of 145/6. The THD is the same and is 0.09%.
Characteristics of digital to analog converter (DAC) are different, Burr-Brown 192 KHz/24-bit for RX-V377 and 192 KHz/32-bit for the STR-DH590. 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.
Both models do not have WI-FI support. Only the STR-DH590 has Bluetooth support. Each of these units does not support Apple Music. Competitors do not have built-in Spotify service. 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 competitors are not able to scale the HDMI signal. Dolby Vision technology found support only on the STR-DH590.
Each receiver has 4/1 HDMI inputs/outputs. The HDMI Audio Return Channel (ARC) feature supports both devices. 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. Receivers do not have a built-in phono stage for connecting a vinyl player. A voice control is not available. An ECO mode is only available for the RX-V377. The setup assistant will help you configure Yamaha RX-V377.
None of the rivals equipped with Dolby Atmos multichannel audio decoder. The receivers do not support the surround sound technology DTS:X.