The shootout everyone was waiting for is here.
Lets start with the Denon X4800H (R69000)
9.4 channels
11.4 channel processing
125 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
HDMI 2.1
Dolby Atmos, DTS:X, Auro 3D capable
HDR10, HDR10+, Dolby Vision, 8K Upscaling, 8K Passthrough
AirPlay 2, DLNA, HEOS
Ethernet, Wi-Fi, Bluetooth
USB and Phono inputs
Then we move onto the Onkyo RZ50 (R44000)
9.2 channels
11.2 channel processing
120 W (8 Ω, 20 Hz - 20 kHz, 2 channel driven)
HDMI 2.1
THX Selectâ„¢ certified
Dolby Atmos, DTS:X capable
HDR10, HDR10+, Dolby Vision, 8K Upscaling, 8K Passthrough
AirPlay 2, Chromecast
Ethernet, Wi-Fi, Bluetooth
USB and Phono inputs
Dirac built in
On paper very similar except the Denon having slightly more power (5Watt) and 11.4 processing vs 11.2.. The denon does not have Dirac (R6000 extra) but is can take 4 sub woofers (is this really necessary). Other than that the Onkyo definitely sounds more crisp and for the person who likes detailed music and clear sound effect will choose this over the Denon especially with a R25000 price difference. My opinion after testing both side by side is the following:
Denon 9/10
Onkyo 10/10