My experience with ADSL1 modems on an ultra-long line many years back showed just how much difference modems can make, and also the same is true for some DSL cables and even micro-filters in certain conditions but not others.
I would expect the results to vary slightly - although not necessarily enough to affect ranking order - according to distance for VDSL2, because presumably the frequency spectrum will differ as well as the absolute voltages of both signal and noise. It would be interesting to results compared for long vs short VDSL2 lines.