Here's something to mull over then...
If you take the 0-30, 0-60 and 0-100 times from a TS and V6 to calculate rough estimates for their 30-60 and 30-100 acceleration you could conclude that on a 30-60 sprint - very common on any circuit - the V6 will be around 1 full second quicker, and that on the longer straight 30-100 sprint it will be over 5 seconds quicker.
If you then said there will be at least 4 of the lower speed sprints on a track and at least 1 of the longer ones, then you end up with just over 9 seconds of advantage, which isn't by any means stretching the maths...
So even if the TS can lop off a few seconds in the corners, and lets be honest, we're not talking Rolls Royce to Lotus Elise differences in weight and poise here, then the V6 is still going to end up 6+ seconds quicker round a lap. That would be quite noticable stood on the side watching!
<Off to put on flame proof suit>
I also think fitting the Q2 to any of the V6 cars would make a good difference of at least a second on most tracks. At Colerne getting the power down out of most bends was OK... but out of the hairpin it was painful, I had to wait, wait, wait else the tyres just chirped away as it scrabled for grip. If this was improved, which a Q2 would dramatically, not only would the car have been quicker around the hairpin, but it would also have carried extra speed down the following straight etc. etc.
But at the end of the day, it doesn't really matter. As long as you love driving whatever car it is, it's all just theory and of little importance unless we're about to create the Alfaowner.com touring car series!