Well, ST:O is going for the "every player is a captain of his own ship" thing, which is pretty cool in my book, actually makes a lot more sense to me then their initial concept (every player can be any rank or position on a starship - while it may sound cool at first, when you start thinking about how would they create game mechanics that actually work with that, you get a headache

). That however means that if they stayed 100% true to trek canon, most of the players - ships would look much the same, so they introduced a post nemesis story where Starfleet starts building very modular ships. The result should be that every player can end up with a ship that looks unique. Hopefully though, if someone will want to captain a canon looking Akira, for example, that will be possible too. When you look at their art direction in this context, then it starts to make a lot of sense. MMO is a very special type of game with unique problems of it's own. Excalibur, not being a MMO, can afford to look a lot more canon.
I really don't think there's a basis of comparison for the two games. From what I read on their website, the gameplay of ST:O will be quite different to that of Excalibur. ST:O is a commercial MMO, ST:E is something totally different. And hopefully, both will rock
