F.king

Horry
Even though I am not spurs fans, I still think that Horry is one of the best players in NBA

if you see the statistics, he is not the toppest players.
However, if you watch his games, his importance is as same as the best players in every team.

he can do everything in defense and he is also a very good offensive player
In addition, he is not a self-fish player and he could choose the best decision in the important memont
therefore, when he is in the game, his teammates can be much easier to score because Horry knows how to run to a place to break the zone (run out to three points line, screen, run inside for waiting offensive rebound or score...)
because his FG% is really good, he can always break the zone for his teammates without his directly assist and his teammates can score much easier that not have to pass to him; therefore, his statistic is not as good as "superstar" (Of course, his pass assist is very good too; but usually he is not the one assist directly to the player who score)

he defense is really good and I don't know how to explain( I am not good in basketball)
but you can see he can assist teammates to double team in the right time but not miss the player who he has to follow (and his defense is not too violence)

therefore, I think Horry is more important
because I think even though Mcdyess is very good, but he is not as good as Horry in some jobs which is not in statistics

p.s. maybe I don't really understand Mcdyess, because I didn't watch his games a lot
I feel sorry if my points are not correct