@IceSweetVanilla Option 2: If the rigs on the models are identical, you can simply swap one rig for the other in the clothing modifiers. Correct any imperfections using sculpting.
Option 3: Go to @gifdoozer p-site and watch his video tutorials. They're very detailed.
@IceSweetVanilla Quick Guide
Option 1: Take two models, for example, Grace and the model with the clothes you want to use. Pose them roughly the same, exclude the second model from the render, leaving only the clothes. Correct any imperfections using sculpting.