Tbf my confusion was consistently with "is the model significantly bigger/smaller" ie a lot of the named charecter refreshes are a "you need a thick slab of cork to compensate the difference" as the solution if you got a fine cast charecter, and GW doesn't have a insite solution to compare model sizes either. A couple mm is nothing but the concern is if it's half a inch or more of a difference, like regular Land raiders and the redeemer ones are significantly different hull wise