given that the X1 is based off the same platform as your E90, ride should be very familiar and in fact they are similar. I was also surprised to find out that tire and wheel sizes are the same (except minimum 17" on X1 due to larger brakes). You may have some better luck querying feedback on the performance tires on the E90 forum since they're likely the same models being used.
F25 X3 N20:
2010 B8 A4 2.0T quattro (current)/
2013 F25 X3 x28 N20 (babymobile)