The Cooltech V2 sits nicer, IMO.
It is made for the RS so it doesn't stick out as much. It also has fewer connecting parts, so it's less likely to come loose and is easier to set up. The GrimmSpeed looks like a universal solution. Cooltech's looks properly custom, to me. I had considered purchasing another tow hook cover and cutting it out for a cleaner look. I didn't do that though. Because the Cooltech sits so close, the hole from the missing cover is much less noticeable than with the GrimmSpeed.
I never bought the GrimmSpeed, because I had seen it in person, and didn't like it. RS owners that have the GrimmSpeed and see my Cooltech seem to prefer it. At least a couple have purchased the Cooltech, having already owned the GrimmSpeed, after seeing mine.
The best reason I can think of to buy the GrimSpeed is if you think you won't have the RS long, and hope to reuse some (or all) of it on a different vehicle in the future. That said, it's a relatively small investment relative to the cost of a vehicle and I'd rather have the Cooltech even if for only a short while.
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