whats the benefits of the Evo 3 chassis vs the 6?
Honestly not much, I think the 6 has improved in every single way other than putting on about 200 lbs, even though the 6 is still a pretty light car. 6 has better traction, better braking, better handling, stiffer chassis, stronger engine with 45 ft-lbs more tq, better interior, more safer. The 6 makes a 7-8-9 feel like a 747, and an evo x feel like the Hindenburg.
I think the benefit that I get from it is that I just love an evo 3 and this particular evo 3 has a ton of character. It is very raw to drive, mechanical front and rear LSD diffs, it is just fun. This car is also pretty rough, so I can drive it around, park it, have a dog and ice cream in the car and who cares; which is lacking in my 6. When 6 got here it was super more clean than I expected, but that comes at a cost of worrying. The other thing is that the 6 doesn't really need anything, and I like having a project on the go.
The 3 is raw. Lighter than more agile. The 6 probably feels like a 747. And by that contrast, my STI probably feels like the Hindenburg. So GR's are like the International Space Station.
I remember sitting inside the new wrx and thinking wow, this is basically a CUV.