Have stayed at both, would definitely pick the Bellagio over the Vennettian:
- hotel rooms are bigger at the Vennettian, but I felt classier at the Bellagio (and still not small!)
- The fountain view rooms at the Bellagio have a STUNNING view! The view from the Vennettian is not great (depending on room, I suppose)
- the pool area is much nicer at the Bellagio (lots of lush greenery etc.)
- don't know whether it is just me, but the walk from the parking lot to the hotel tower elevators seemed like MILES. Bellagio car park to rooms is still a walk, but didn't seem NEARLY as bad.
- the whole casino and public areas in Bellagio seem classier and on a more intimate scale than the Vennettian.
- in general have seen better deals at the Bellagio than the Vennettian (have regularly seen $169 for the Bellagio with free upgrade to fountain view... Vennettian always seems over $200 a night).

Would definitely go for the Bellagio over the Vennettian...

Have heard very good things about The Wynn, "The Hotel" and Four Seasons, but haven't stayed at any of them (yet).

Boo