I sized down a half size (to an 8) in Rorys and Carsons (I do not want to wear socks of any bulk in them).
I stayed my true size (an 8.5) in my studded Billy (not short, but footbed is probably same because I DO want to wear socks besides hosiery in them.
My foot is slightly wide, not wide enough for "C" width though.
Hope that might help siome. . .