Android Auto and Apple CarPlay is in Honda (and lots of other cars). Toyota is currently in a state of rejecting these integrations, which I think is foolish.
Haven't done serious research, just reading some reviews online and going to the car show. I think I read that the Odyssey rides more quietly.
I also like the 2018 Odyssey's visual refresh. Sienna hasn't changed in eons it feels like. Inside, I wasn't a fan of the second row seat tracks on the Sienna.