I'll be interested to see how Soderling does at Wimbledon, grass is surely a more ideal surface for his game? Quicker speed through the court and a lower bounce.
Soderling's control of low bouncing shots is poor like most tall players, he likes the height the ball bounces at on Clay, the problem against Nadal is that his defence is too good so he has to play closer closer to the lines so he misses more. He also prefers a slower surface, at least now days, because he can still hit winners no matter how slow the surface while those playing against him can't return at the depth required to offput him without trying to ball bash against him.
His front court transition is also pretty poor which limits him further on Grass and can be exploited on hard.
Nadal of course is the exception where the opposite is true given that he gives high bouncing shots regardless of the surface and has little variety.