But looking at the interiors, the layouts are virtually identical. It's just that the Bentley has a lot more leather and chrome. I've gathered some interior pictures of the four-seat models of the Bentley and the VW as well as saabkyle04's comprehensive videos of each car.
Phaeton front: (Note that the vents are behind the wood dash paneling.)
Phaeton dash: (The gauges are identical, except the VW also gets oil temp and volt readouts.)