I agree with the above posts.
However, I have noticed that sometimes there are tiny differences between generic and name brand drugs. I'd try the tri-sprintec, and don't worry about what you read online, because you'll find horror stories for anything. However, if it's not working, switching to ortho wouldn't cause any problems (because they are, essentially, the same thing). If you're not happy with the tri-sprintec, go ahead and switch whenever you want, and just stick to whatever schedule you started out on. You shouldn't experience any side effects from switching.