You've caught the difference between these two (as written) very well: Betty looks wholesome; Ronnie, a little more sophisticated and maybe ever-so-slightly fake (or, put another way, Bettie's just being Bettie posing for a photo, while Veronica's hamming it up a little).
Creepy? No. I look at this as a BIG F-U (if the pic is from Archie's POV), saying "yes, Betty/Veronica is my girlfriend now." ;3 Why those two fought so long over some silly boy... Perhaps it was some natural rivalry between our ladies? They were/are so obviously meant for each other! LOL!
Plus, you have to admit Betty/Veronica is a hot couple.