I can't/won't answer for others but can answer on my own behalf.
I have only compared the ARD blue tune to the stock S70R tune. All that was changed was the boost map 'required pressure ratio'.
I have no idea what other tuners change and, to be fair, the off the shelf ones that you cite probably aren't that much different. Personally, I wasn't interested in making comparisions with other tuners. I bought into Robert as a straight up guy with skills and knowledge that would exceed the offerings that were otherwise available (through tuners like those you mentioned). I assumed that the ARD product would be better than the others, so if I were to make a comparison with these other tunes and find the same then that would not serve to assuage my disappointment.
Over the course of all this I have spoken with quite a few people who's knowledge of tuning these cars far outstrips mine, and they were pretty much all appauled by the map that I was sold. There really should have been more to it, and even what was changed should/could have been way better.
Add to that that, despite my making a bit to bit comparison of the stock and blue tunes and finding only boost map variations, Lucky actually lies to me to tell me that he does more than that. I quote "With out going into detail of how we tune we do in fact touch more than just the boost maps". Well, not on mine you didn't.
I'm more disappointed than I am angry, but the fact that it now seems I'm not alone makes me feel slightly less of a mug.
I can't work out how to post the full comparison from tunerpro for those who are interested, so sorry about that. If I work it out then I'll post if anyone is interested.