They both work on the same principle, and both have been well-received by field providers. I have some of each type.

There is 1 difference, though: the CinchTight is now available in a flat packed format. This makes it very easy to store them in shallow pockets (of your pants, backpack or med kit) where the bulkier rolled format would be a hassle. IIRC this flatpack version is not mentioned on their website.