That was basically the whole point of the question, as all manufacturers claim their product to be the best, you have to get 1st hand opinions before splashing out your cash. With so many variables involved obviously your not 100% gonna get the same effect with a paticular piece of kit every time, so what I was hoping for was maybe a majority of people using one or the other as like most things in the tuning world, reputation and word of mouth go a long way in decideding which product to use/shell out for
As they probably are very similar in all aspects, if one of them did give better gains than the other, to the point where you could give a similar car a caning, I know which one id go for every time!