I've had both. MK3 VR6 (with 2.9 TB, tubular manifold, downpipe, exhaust etc about 190bhp if i remember correctly) and Octy vRS currently (chipped to 210-220 bhp).
VR6 was simply an animal. OK cornering wasn't great neither was the car itself. But the engine tune and torque at any revs was fantastic. It's didn't hang about either ask will gill, and the heavy lump got it off the line well.
I seen one just like miune at santa pod, but with a supercharger. It was insane, the noise and the speed. Incredible.
The 1.8T I have now is faster, just, but delivers the power silently with no fuss or drama. The sound isn't anything special - just generic 4 pot noise. But with an open filter and a single box I can imagine it would be something more special.
On balance i've gone for the 1.8T for the potential to produce a good sound track and the ease of getting 350bhp by chosing the right turbo, injector and intercooler. No internal mods required.
interesting.....
you lot have managed to vote almost 50/50 lol