This is indeed, by all appearances, an Asetek unit - with a Corsair logo. We've used them where I work for over a year now, and oddly have used the name Hydro CL1 for them in our marketing. I wonder if Corsair got inspired, or it is just a coincidence?
I see a number of differences just looking at the two of them. The mounting hardware is quite different for one thing. The rest may be cosmetic.