Pre release vs post release- whi​ch i​s better?

BTS releases another mv a few weeks after their comeback; and txt and enyphen do it too; but otherwise pre release seems to be common in kpop. Does it make a difference ?

Quote from Kataphract

I dunno really.

Edit: I think its because the post releases are guaranteed viewership and so they just release it anyway.

hmmm probably fans have heard the b sides so they will anticipate the MV.