Hello !
The difference is huge, I worked on Polish vag, on vag com from ross-tech and on Vw VAG and VAS factory testers. Vag com has functions, addresses, matches, masswerte blocks, database of faults based on factory VW data, practically the entire program is based on professional factory testers, in short, you can rely on it 100%. However, this is not the case with the Polish vag. In my opinion, it is only suitable for polling and deleting the fault memory, although not completely. Apparently everything is translated into Polish, but it is very easy to lead us astray. For example, the error determined by the factory tester says "Break or short circuit to ground N75 valve", meanwhile, the Polish vag translates the fault "error unrelated to the equipment" Czech film. It is similar with the current parameters, in a diesel engine it shows, for example, the ignition timing. It supports CAN buses in the latest versions. But I really recommend Vagcom.
Regards!
gka3
