Under Windows XP, we tested the performance of all possible combinations. What was apparent was that the 3D Mark 06 score was not greatly affected (only one point should be considered as minimal):

But other, synthetic benchmarks were affected. Comparing the 2GB Crucial and 2GB SuperTalent PC2-5300, in some tests Crucial was faster, while in others SuperTalent. Looking at the specs, the SuperTalent has a small advantage due to the fact that is has 5-5-5-13 timings, while the Crucial has 5-5-5-15: