As a big X-Men fan who considers the main comic range to be the definitive X-Men, I can tell you that X-Men Evolution and the movies aren't really all that close to who the comic X-Men are. It's been many years since I read the X-Men/Trek crossovers, but I generally remember them feeling true to the comics. I don't think the crossover was a great idea or executed all that well, but it's just the difficulties of crossing over two very different series. The characters were true to who they were as far as I remember.
Yeah, I do understand that the TV shows and movies aren't the "real" versions of the characters. I was speaking subjectively. Interesting to hear that the novel was character accurate, as far as 616 went.