What's with the different colors on Muskin pc3500 lvl2?

I'm planning to buy another stick, but I'm not sure which one to get. Now looking around I see they have white/silver, purple, blue, and black. What's the difference? Are some of these bh5 and some not? I know when Mushkin re-released a small batch a while ago they weren't black (silver or blue I think?), but will they perform just like the old 'black' sticks?

The heat spreader color does not pertain to the chips, revision, etc. Heatspreaders just came in random colors unless you ordered the RAM direct from Mushkin and specified what color you desired. The heatspreader color has no significance besides aesthetics.

Ah thanks for clearing that up for me.

Tipycol