Mitchell And Ness Jersey Question? Size compared to Majestic

[Big Mac McGwire]

hey guys, im asking whoever sports jerseys for some help. i want to get my uncle a mantle mitchell and ness throwback. The size chart says a XL for Mitchell and ness is 48 and a 2XL is a 52. Well Majestic jerseys XL are 52, my question is a mitchell and ness throwback going to be much bigger in a size 48 then a regular majestic size 52?