I just bought an e30 (325i) last week and drove it every day until getting the S2 out of the garage today. Wow....I think I like them both. I was thinking about selling the S2 while driving the e30, but now I'm not so sure. The s2 definitely feels like a bigger car, and while I haven't driven an M3, my e30 does have some aftermarket springs & rides very low & corners very well. I think I like them both for different reasons. Perhaps if I drove an M3....I'd be willing to part with my s2. I like small cars...and the e30 is definitely smaller. Nice big trunk though for hauling mulch...8)...very practical little cars.

I think for a daily driver, an M3 or any e30 would be easier to live with, normal people can ride in the back seats and the trunk is surprisingly roomy.

 

I agree, the turbo Cup cars are really stock cars with less options added and a great chassi that was later on offered to the normal production cars competing against other identical 951's.

While the 951 was competing with identical cars the DTM series where the E30 has always been a bit of Formula 1 with bodies when it comes to technology and it was pretty amazing to see the evolution of the E30.

But, comparing a 944S2 to a stock E30 M3 can't be anything else than a win for the S2. But who cares really, they are both wonderful cars and I am unsure which would be more fun to own and drive.