Well here's the thing, bikini packs are handled different in DOA5 and X3: DOA5 actually has significantly less bikinis than X3, in DOA5 each bikini pack that features the girls only has ONE for that girl. In X3 there's way more: For each new bikini pack that's added in that game, you get 6 recolors of that swimsuit, which means 84 from 14 total packs and 6 from one swimsuit...DOA5 doesn't do that, when they do a pack they release 1 for each girl, and sometimes not every girl is featured.
X3 has way more since they only release bikini packs aside from the occasional fetish DLC(sometimes they even release 2 bikini packs alongside each other...that's 12 swimsuits of different color smack right there!) while DOA5 does it every so often as of LR, preorder swimsuits for LR could count but then again it was originally preorder exclusive, and once again that was 1 swimsuit for the girls that were featured.. As I've said before most people are exaggerating without actually doing the math, you can't tell me DOA5 has more or equal amount of swimwear to X3 when X3 has been out since I believe for 1-2 years while DOA5 has been more focused on collaboration and packs of different genre.
To anyone who has a Japanese account, make sure to confirm when the costumes release about how the bottom half looks please. :-D