I wrote about it a lot in the past, but definitely, EVNs have a much wider range of approaches to LGBT issues and tons of yuri EVNs are actually made by minority creators. Of course, sometimes you have a lesbian creator making fluffy GxG porn because they enjoy that stuff, but generally, you'll have a lot more games implementing a semi-realistic approach and trying to build a believable dynamic for the GxG romance. Even something like Love Ribbon, which might look super-fetishistic at first glance (sister incest), has some very interesting scenes of one of the sisters discovering her sexuality and trying to make sense of it. It feels way more authentic than how Japanese writers usually do it (if they even bother to touch the topic), and that's at least to some extent because Razzart, the author of that game, actually knows what she's writing about. :>
To be fair, this game's writer is a guy, but did a very good job here – and that is despite using a cliched "all-girls school when everyone is assumed to be a lesbian" setting for the first game... In a way, this series is a really cool example of Western influences and influences of otaku media clashing and melding into this weird amalgamation of themes that do not always agree with each other, particularly in Academy, where the fluffy romance formula did not synergize with the horror plot at all. Maybe playing just the sequel is the way to go after all... '^^
Edit: And only now I realized how sad it is that games conditioned me to consider "main plot" and "romance" as separate entities and be genuinely surprised when the two are connected in a truly meaningful way. Video games suck.