My only experience with the F10 was the comparo invitation. I drove the new 535 done up minimally, and the 550 with all the goodies. I felt the 535 was pretty Lexus-like, with better power and an interior more to my taste, but not particularly fun to drive. The loaded 550 was head and shoulders above that, and had more seat-of-the-pants power, true, but it also handled like a completely different car.
When I got back in my E60, I ran the exact same course. My E60 is not sport packaged at all, yet it felt that it had much more power than F10 535, and the difference in handling was like the difference between my 535 and a 335; it was just a different natured car altogether.
535i, Monaco, Cream, Light Poplar, Comfort Seats, PP, Nav, ED.