The Body Mechanics is slightly different, though it is highly dependant on the level of the practitioner. Usually it is cross compatible in Shaolin with the exception of a couple of the more extreme sects.
The catalogue of techniques is largly similar between all.
The footwork again is similar with the remoter village styles relying on larger stances than those closer to the temple.
Some shou fa and entrance strategies are quite different
Jie li da ren, borrow power principle is the same in all.