I have seen both in several roles, and I concur fully with those who said it's like comparing apples to oranges. It's probably no secret that my answer is Patti (her commanding presence and ownership of the stage is something captivates me), but I absolutely love everything that Bernadette brings to the stage when her feet hit the planks.
Why do I prefer Patti? My reasons are many, but one of them: I, quite frankly, just prefer Patti's voice a lot more - both her speaking voice and her singing voice (especially her belt).
"Of course there is the castle - the ruined castle. I find it lovely. Probably because it's ruined, I suppose." - Passion