>>7093661no. if something is scaled up, everything would assemble the same way, but just be in larger size. Look at this Buster Gundam. The 1/100 is simply an upscaled version of the HG 1/144. Parts are the same just larger.
But for the MG 3.0 vs RG, it's automatically different because there's no pre-built inner frame on the MG vs the RG so there are things that are put together differently.