I haven't bought it yet.
I have a ludicrously modded Skyrim, and I like my mostly vanilla Fallout 4 as much as that, but probably more than vanilla Skyrim.
Once Fallout 4 is heavily modded... no contest.
(I had Fallout 3 modded... even had Moriarty’s bar in Megaton modded into a strip club complete with pole dancers)
AS soon as the prices drop on Xbox One (and the game) I may find out.
Did, however prefer Fallout New Vegas to Skyrim, although SKyium is a much more scenic place!