I don't know what's best. Like I said, I'm probably the only one playing who prefers and would choose the 2003 anime, so I don't know if just one person using that category would skew matchups or anything. (That said, I really don't like and can't write the other canons.) So I'll leave that up to your judgment.

(Oddly, AO3 also claims a tag for one character is canon to the fandom, but not the 2003 anime specifically--even though she only appears there. I don't get it.)