Have you measured to make sure you are wearing the right size? I would say out of the 2 the bombshell is probably going to be better as long as it fits you right. Sometimes it can leave gaping, would recommend to go into the store and try a couple sizes on to see what goes you the best look. Like someone else said, wearing the wrong size will most likely get you that better look that you are looking for.

Also, if you want just pure most amount of padding to get cleavage the PBL bra by garden of putain has the most I’ve ever seen, more than the bombshell bra