Depends how important the date window is to you.
If like me, it is, 388 everyday of the week.
380 is nice. 388 also comes out so nice.. Hmm,...
Personally, i wish for simple dial on Rads like 183/210. So im still holding my horse on these rads for now.
But if i hv to choose between the two, it'd be 380 now coz auto 388 would be thicker on my wrist and my perception on Rads is thin and elegant.
Agree with vootzilla.
Radiomir is more of a dress watch thus thinner is better