Yeh, i reckon it would run 185 with cas2 no problems.
basically i would say this is like some of the pc133 modules. They are cas2 @ 100, or cas3 @ 133. These ones look to be cas2 @ 185, or cas2.5 @ 200. To me it sounds like the same prduct with a different label, go for the cheaper one in my opinion.
JayMan