I wouldn't trust the mummy as that goes for a fortune and there is no fabric to it so might be easy to paint as a recast. As for the Bride, these were made in very small numbers. It would not be easy to fake a PF due to the fabric component plus there isn't a HUGE market for Uni Monsters like there is for, say, Iron Man so I don't believe it would interest a counterfeiter to reproduce these. There was never a warning from SS about recast PFs. It was more busts and statues that didn't have a fabric component to them (usually). That said, unfortunately their website did warn to be cautious when buying anything from China so buyer beware.
Hope it works out for you. Pay attention to the box and packaging. Even on real PFs their are flaws in the paint job but you can usually tell by the overall look of the item, it's styro, and its storage box. (to note: for The Bride and Monster SS did use a rather rough styro box which is authentic). Good luck!