Mario + Rabbids is impressive visually, but when comparing it to Odyssey one should really consider how different the two genres are. Few games are better suited for high fidelity graphics than those that are tightly pathed and feature frequently fixed cameras (which caused me some of my only frustration with the game).
It's what allowed Super Mario 3D World and Captain Toad to look so gorgeous, whereas a more open world on the same hardware would have had to make additional sacrifices. Basically, Mario + Rabbids should compete visually with Odyssey, as Odyssey is a greater strain on the hardware.
Still, from what I've seen Odyssey may indeed wind up looking superior.







