It's not much different to the 48 in terms of curve, but it's the extra height the mech will be at compared to the granny etc.
Spec is a 22T full swing and 12T form mid to top.
But that may be to match up with the 48/36/26 of the 5 arm (952) setup and provide their XTR perfection shifting as that's where the bump and lumps on the mech will be designed for (46/34/24 for the 4 arm version)
You can normally get away with a bit extra.