Question about Blender versions for creating clothes cc

Hi. When you come across a tutorial where two versions of blender are used, close it right away. It is a sign that the author was a beginner themselves and did not think of googling how to transfer weights and sample vertex paint right before teaching others how to do it in a backward way, so you can expect more "impractical recommendations"

Everything can be made in one version. This video shows the adaptation for 3.6 but is applicable to 4.1 as well. It is not a proper tutorial, just a demonstration, but you most likely already have some idea of what is done for what reason