I am far from an experienced ring driver, but having done a number of laps round the ring on track days and public days, I love it when something that shouldn't be coming up quick is. My time round the ring has been with E30 M3, E92 M3 and a 964 C2RS.
It teaches you lines and carry speed very quickly if you let them past and tail at a safe distance. I would want far better brakes in my GTi to get that close to a GT3 tbh.
I was well hounded in my E92 M3 by an old Mercedes. I let it past and tailed I simply wasn't competent to stay with it for half a lap...... I then found out it was a very heavily modded 2.5 cosworth on Avon slicks, the guy had clocked sub 8 minute laps in it.....
I did think the E92 M3 was moving round more than I had hoped !