Diamond Pastes

[Shaotzu]

Just curious as I was about to order a CrOx crayon from SRD, and was just looking around and saw the various diamond sprays as well. Now, whenever I order things, I always try to combine things a bit, and since I'm still relatively new, I'm kind of in the "try some stuff out and see how it goes" phase. I'm thinking about getting a few "replacement" webbings/fabrics and trying different abrasives on them.

I understand the Chromium Oxide is like .5 micron, and is a good refresh one before maybe having to step down to a 12k finish stone.

From what I've gathered, I imagine the diamond .5 is similar to the CrOx, and the .25 micron is the "either too sharp" or "perfectly sharp" don't need it/hate it/love it abrasive.

My question is, seeing the 2 and 1 micron abrasives, how would those compare and when would they be used as opposed to stones?