The last time these two faced each other, Anand was different. I can certainly say that Anand has improved and gained some experience. NOW, it will be interesting to see how he matches up with Kasparov. Now i think we can say that they both have seen it all, almost. Now, it will really be a clash of galactic proportions, more so than those 90's. If there ever'll be such a match-up, we'll know for sure whether Anand has really become the best(if he wins after Kasp managing to play his natural game) or he still has a way to go(if he loses). None of us can judge at this point in time as to whether who'll beat whom for sure just because Anand has done a lot of things after his loss to Kasp at the WTC. Only a match-up, that too a 10-15 gamer will hold the right answer. Everything else will just be a desperate attempt and a waste of some fingerwork.