Kirilenko hasn't proven himself enough, playoff success may have eluded Garnett, but playoff BERTHS have eluded Kirilenko. He has yet to average more than 18 points a game and make an all-nba selection. Garnett is a better player easily, he is a better scorer, better rebounder, more consistent and just as good on D, just doesn't get as many stats in the steals and blocks category.
Kirilenko is great, but sometimes he dissapears for countless games, and then when he comes back he normally does it well. Consistency is an issue for him and injuries have hampered him from the type of consistent, nightly play that has made Garnett have such a reputation.