This match is about as close as it gets, and its sad that it isn't the final as both women are clearly superior to their counterparts on the other side of the bracket.
Their one-on-one record favors Gail, but its close. Their head-to-head record in title matches only, as well as TV matches only, is also very close.
Mickie has held 9 major world titles for a total of nearly 700 days, while Gail has 5 which she held for about 500 days.
Mickie is the only woman to win all three of the WWE Divas, WWE Women's, and TNA KO titles. Gail is the first woman to win the WWE Women's title in her debut match. She is the first woman to ever be named TNA Knockout champion, is the longest reigning champion of that division by combined days, and also holds the longest single reign with that title.
While Mickie is actually quite good, Gail is the clearly superior in-ring talent when you consider the quality of their career matches. Mickie has never had a match in her career that reached the 3-star level, while Gail has at least ten such matches. Gail's '07/'08 program with Kong was the greatest women's wrestling feud to play out on American national television this millennium. Also the growth as in-ring competitors experienced by women like Madison Rayne and Taryn Terrell could be strongly attributed to their chance to work extensively with Gail. Mickie delivers solid matches against talented opponents, while Gail gets the absolute best out of every woman she gets in the ring with regardless of their ability level.
All of this combined with the fact that most of Gail's success came in TNA where the division had strong talent, and was treated as a serious wrestling division; while the majority of Mickie's came in WWE where the Divas division is an afterthought, often classified by many as a "piss-break" segment, really has me feeling like Gail is the most deserving woman to win this match, and therefore rightfully this tournament, BUT...
I sadly have to vote for Mickie strictly as a strategic measure. I believe Mickie has a better chance of beating Trish in the finals than Gail does, and right now I'm more focused on making sure that the least talented pro wrestler left(Trish) doesn't win, than I am on making sure that the most talented pro wrestler left(Gail) does.
So... Vote Mickie, despite Gail being better(hey, at least its close).