My opinions about the staff:

Director: Motomu Toriyama vs. Tetsuya Nomura - Based on the list of their games, either director could do well.

Character designer: Tetsuya Nomura vs. Tetsuya Nomura - I think Nomura will be the clearly better character designer here.

Art director: Isamu Kamikokuryo vs. ??? - We'll see, although I'm not really impressed by the list of Kamikokuryo's games.

Main programmer: Kazumi Kobayashi vs. ??? - Again, we'll seel, although the only impressive game by Kobayashi's list is Chrono Trigger.

Movie director: Eiji Fujii vs. Takeshi Nozue - Nozue's easily better, IMHO. I wasn't really impressed by TSW's cinematics or FFXII's FMVs, while Nozue has done cinematics for FFIX, AC and KH.

Composer: Masashi Hamauzu (main theme by Nobuo Uematsu) vs. Yoko Shimomura - Shimomura, IMHO. Hamauzu's work in FFX didn't feel anything to good, and from what I've heard of the samples so far, the same for DoC soundtrack. Shimomura usually makes good music, and her work in the KH series is great.

Producer: Yoshinori Kitase (FFVIII, FFX, FFX-2, DoC) vs. Shinji Hashimoto (KH series, AC) - *looks at Kitase's list... gulp!* I think Hashimoto's past work is more impressive, although Kitase has worked on more games.

With all this comparison, I might actually look more forward to FF vs. XIII than the actual FFXIII.