First, I don't think I've ever seen a quadruple post before, that takes some kinda special. Anyway, I've married a few different girls on various files as a female character, and there seems to be no distinction in the actual game. The only difference is they say "girlfriend" rather than "boyfriend" for a lot of text, and Yu said something like "a girl playing papa" in one of popuri's scenes, so I guess they actually changed some text manually too. Other than that though, it seems to be equivalent. You get a whole actual wedding scene as well, and you're both in bridal veils. I'm not sure how kids work, I'll have to get back to you on that since those take time.
Edit: I just realized this is likely off-topic. Sorry about that, let's make a new thread for gameplay discussion. The mod's working fine, by the way. I'm in my second summer and I just got married to Jennifer. The worst case scenario for text is that it sometimes just doesn't appear, which is somewhat funny anyway.