The new ones do? I seem to recall the older, blocky numbers being different sizes front and back, but I thought the newer, rounded numbers were the same on either side.
Same font, but the front numbers are smaller than the back. Back numbers are 12", front are 10".
I customized a Terry Bradshaw M&N for a guy who wanted a Swanny. I thought I could just change the size of the back, front and shoulder numbers in PS. Not. Each 8 was proportioned differently.