is something no turbo motor can touch when it comes to how linear and smooth the power delivery is, no to mention the sound. Furthermore, there's less moving parts and things that need constant general maintenance so you're looking at a more sporting car that you can take to the track and flog numerous times before any kind of service is needed. Additionally, the GT3 is much easier to drive at the limit than the GT2. The GT2 has snap oversteer like you wouldn't imagine, too many people who buy them really do not know WTF they're getting into until the car is stuffed into a guardrail.
"It's been my experience that straight-line acceleration is probably the first aspect of automotive performance that any intelligent driver gets bored with." - Peter Gregg