My Edition 30 currently has Revo's Stage 2+ flash on it, but running the stock map as I've recently put it back to standard.
Prior to that I spent a lot of time with my tuner custom mapping it, and when I bought the car it had Revo Stage 1 on it. So I have a good base for comparison.
Revo is all about smoothness and drives very OEM. Any custom mapper can push things as far as you want them to, but in my experience with the K04 engine, certain sacrifices have to be made. Namely boost surge taming, more frequent oil changes, more frequent HPFP follower replacements, big drop in mpg, expensive pumps, clutches, downpipes, intakes etc etc, not to mention excessive wheel spin in the wetter months.
My custom map was bonkers fast, but it was nothing like as smooth and every day drivable as Revo.
Paragraph 3 is the main reason I went back to standard and Revo's 'stock mode' is somewhat better than VW's original map, feeling punchier, smoother and just as economical.
Revo stage 1 is also superb in my opinion and you don't need any of the expensive aforementioned parts.
To summarise, if you want pub numbers, get a custom map. If you want smoothness, reliability, adjustability (with an SPS switch) and realistic hp gains, get Revo.