My wife has a BMW X1 Xline and the seats are fantastic as are the ones in my new 320i.
Out of interest, what year is your wife’s X1 Elliot? I believe that they improved the seats for the 2019 model (we last looked at them early 2018)? Pleased to hear that you like the seats in the 320i as that’s top of my list for renewal (if my wife can get in and out of it OK). They look similar to those in the 5 Series which I know are excellent.