In terms of power I'd say you'll make about the same with either one. There was a explanation on how Ecutek is easier to use for the tuners, though I don't remember the details so I won't go into that haha.
Feature wise once Ecutek releases the rest of the features (who knows when that'll be but I'll keep waiting...) it'll definitely be better than Uprev. Until then Uprev is the more complete solution.
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