I believe the 250 has smaller brakes if fitted with steels or 18” alloys. If you order a 250 with the 20” alloys, then the brakes are the same as on the 300, which you cannot order with the smaller wheels.
With that said, I have a few friends who have 250s on small wheels and I haven’t heard any complaints about the brakes and one of them went from a 300 to a 250.
