I've got the spyderco Medium and the shapton 1k. If you plan on just using the stones to touch up edges the spyderco stones will excel, zero mess, as you can use them dry, and they have a good feel to them once broken in after a few knives.
If you're looking to start at the shapton 2k as a first stone then the spyderco medium would be (in my estimation, I don't have the 2k) a very close stone in terms of grit. The ceramics "will" load up a bit though if you're trying to do alot of sharpening, so they'll need to be cleaned occasionally or you'll get little spots where there's steel built up. The waterstones take care of this as you sharpen and wet the stone.
If heavier material removal is a concern, then I'd go with waterstones period, especially the 1000 grit ones, as they remove fairly quick but still leave a nice edge. The shaptons wear less than other brands so they don't require as much flattening, and you can use a bit more pressure on them to speed up material removal even more.
*edit: You're looking at the Shapton Pro series stones right? They're supposed to work better on hard/wear resistant alloys compared to their other stones.