Roku Ultra + Denon S760: Best HDMI Setup for Roku Pro TV

I have an older Roku Ultra that is connected to a Denon S760.. The Denon was connected to an older TCL 5 series and worked well. I just purchased a Roku 55" Pro TV and have connected the Denon to it through eArc. I have the Ultra set to always Atmos and Dolby Vision. I'm wondering if connecting the Ultra to one of the Pro HDMI ports (60 or 120) would be better. Currently, the Pro treats the Ultra as a Dolby Vision IQ source. If I do YouTube on the Pro, not the Ultra, it treats YouTube as a Smart source.

I do like the current Ultra's Dolby Vision and Atmos upscaling onto the Pro through the Denon, but wondering if anyone has done it the other way or has an opinion on it.