I went from standard C2S to manual sports C2S as I like the lumber support in both but wanted a bit more side support.

There is more support around the shoulders, sides but the seat base doesn't seem much different to me.

I have had trouble with the pneumatic lumber adjust in the past on electric seats-I could never get it consistently comfortable-and I really like the shape of the standard seats so I didn't go the full electrics route. However for broader people I can imagine that they would be painful in the shoulders as they are quite firm. You either fit them or you dont!