Verso & ecutek, you are purchasing a licence to use the software on your ecu. The licence is the intellectual property so that the creator of the software still gets a cut out letting you use their product.

I'm not sure what evo r is offering, I've never researched into it.

I personally would find people who have used which & had the best results, not just necessarily power figures, make your own decision from there.

There are plenty of build threads on here from people who have used all 3 workshops listed above.

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2016 Subaru Outback - Work Wagon
350NM of CVT Goodness
Pit Crew, shit talker.