I think it's reasonable to say a SMS non-CIB collection can be complete without the UPC sticker. That sticker's only necessary if you want the American packaging.

By the way, this thread really makes me want a US copy of Radiant Silvergun for my collection! Also, understatement, where did you get your copy of Final Bout? If it was imported without consent to resell by a mom-and-pop store, I'm going to probably resist your claim to having a US copy. It it was officially sanctioned, though, you should probably hold on to that. It's got to be the centerpiece of your collection!