I know this post is considered dead, but I had to respond to this:
I doubt you would get a good answer, since it's not likely someone has tried both of them.
because I totally have trained in both (and rather extensively)! HA!
Anyway, FiveFingers are far superior. While tabi-style or split-toe shoes are certainly both fun and unique, FiveFingers are the real deal. That said, I also agree with the general consensus that footwear is irrelevant, only training is important. I have noticed personal improvement in technique having switched to Vibrams (though I do allow for the possibility that some of that improvement is psychosomatic in nature), and I also concur that balance is much easier with independent toes rather than the sort of 'hooves' that split-toe shoes provide.
But really, footwear is footwear. To paraphrase Thoreau - "Beware of all enterprises that require new clothes". What you have will work fine, just make sure you work! For a point-by-point in my experience with split-toe, you can check here (http://www.americanparkour.com/smf/index.php/topic,19546.0.html