ebay cables are only good with older version but you might be able to buy the newer version. You only need the one thats less than $300 and compatible with you model and year.

Vag will let you graph: a/f (better if you have a vvt car), total timing, timing pull, actual and requested boost and plenty more. Also itread and erase codes, increase rev limit, change simple things like one push on the door key unlocks bothdoors and tons more. It is best to get a REAL cable from Ross-tech and have access to everything and not some.

As for Lemmingwink/unisettings (revo and unitronics) Read and download