Real world difference between an M3 and a CSL...

[funtime]

Evening all, I wonder if you could share your opinions and experiences with me.

I have an M3 SMG at the moment and have been hankering after a CSL for the last year. I haven't yet driven a CSL, nor come across one on track to make the comparison so here's where you lucky CSL owners come in.

Looks aside (as I don't want to make mine look like something it's not) what would you say would be the difference between the car's below round a track like Silverstone, and the ring?

A) M3 SMG with a few choice mod's - Ap's all round, Intrax coilovers, limiter kit, remap and the all important 18's

B)Standard CSL

C)CSL with the same modifications as A)

The CSL is roughly £15k ontop of my M3 and whilst it's also going to hold it's money better and is no doubt the better car all round, I'm just trying to establish how much difference there actually is in the real world when compared to an M3 with £4-5k's worth of proper modifications...

Munich Legends are currently looking for a CSL for me so as soon as they find a nice one i'll have the chance to experience the difference but until then i'm just weighing up the options.

Thanks, James