Here in the States, it's just standard seats vs multi contour seats. I like the latter for the upper articulating portion which allows my head to rest on the headrest at all times while driving. I can't recall any other seat allowing me to do that. Again, ergonomics and seat comfort varies from person to person. I suggest get in both and see which one works best for you.
2013 BMW X5 35i
Alpine White | Cinnamon Brown | M Sport
2013 BMW 550i
Titanium Silver | Black | M Sport