F30 brakes have been roundly criticized by professional testers, and also by people coming from other BMW models. The legendary brake feel seems to be missing, and stopping distances in every test are poor compared it its competition, as well as E90. Since the X1 is based on the E90, it could very well be the reason for you feeling the X1 brakes are better.
One of the factors that seems to contribute to the poor stopping distances of the F30 are the low rolling resistance tires - so a tire change may result in some improvement, though it now seems even the Msport brakes are not stopping the car as well as other BMWs
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