Pioneer VSX-531 vs Onkyo TX-NR626 comparison definitely makes sense.
A significant difference between the receivers in the number of channels, Pioneer VSX-531 has 5.1 versus 7.2 for Onkyo TX-NR626. Regarding power, then VSX-531 has such a W/Ohm ratio - 80/8, 140/6 when TX-NR626 has a power of 160/6. The THD is the same and is 0.08%.
Characteristics of digital to analog converter (DAC) are different, 192 KHz/24-bit for VSX-531 and Burr-Brown 192 KHz/24-bit for the TX-NR626. Only the TX-NR626 supports Bi-amping feature. Each of the AV receivers can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Only the Onkyo TX-NR626 can connect to the Internet via WI-FI. Rivals from our review have Bluetooth support. Only the TX-NR626 supports Spotify.
Only the Pioneer VSX-531 has support for High dynamic range (HDR). 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 TX-NR626 can scale the input HDMI signal, unlike the VSX-531. The HDR standard - Dolby Vision is not supported by these receivers.
The Pioneer VSX-531 has 4/1 HDMI inputs/outputs versus 6/2 HDMI connectors of the Onkyo TX-NR626. 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. The TX-NR626 has a built-in phono stage for connecting a vinyl player. A voice control is not available. An ECO mode is only available for the VSX-531. Unfortunately, the setup assistant is not available in each of the models.
None of the rivals equipped with Dolby Atmos multichannel audio decoder. The receivers do not support the surround sound technology DTS:X.