Having had an opportunity to test Sony STRZA1100ES vs Yamaha R-N602BL, I’d like to share my impression here to facilitate your choice of a new AV receiver.
The number of channels for receivers is different - 7.2 versus 2.0, respectively, for devices. In terms of power, there are differences, the STRZA1100ES has such a ratio W/Ohm - 70/8, 90/6, while the R-N602BL has a power of 115/8, 105/4. The value of total harmonic distortion is also different, and for the STRZA1100ES it is 0.09%, but for the R-N602BL it is 0.01%. The Bi-amping function is implemented only in the Sony STRZA1100ES. Both Sony STRZA1100ES and Yamaha R-N602BL can transmit an audio signal directly to the amplifier and bypasses any DSP processing.
Wireless Internet connection via WIFI is only possible with R-N602BL. There is a Bluetooth protocol at the R-N602BL. The R-N602BL has access to the Spotify service. HDMI signal transmission in standby mode can provide only the STRZA1100ES. Video scaling is only possible with the STRZA1100ES. Operation with the Dolby Vision is only possible with the STRZA1100ES. HDMI Audio Return Channel is only available on Sony STRZA1100ES. HDMI eARC is only supported by the STRZA1100ES. When comparing receivers, it becomes clear that only the Sony STRZA1100ES has HDMI CEC. In the presence of a built-in phono stage for connecting a vinyl player only at Yamaha R-N602BL. Voice control of the basic functions of the receiver is not realized in both models. There is an ECO mode in R-N602BL. The Sony STRZA1100ES can be properly configured using the setup assistant.
A Dolby Atmos multichannel audio format is available only in the STRZA1100ES. Only in the STRZA1100ES realized a DTS:X surround technology.