135...hmmm...I had a long test drive of the 135 before I bought the S3. Three big issues - ride; traction and looks. IMHO, the S3 is superior in all three areas.

Ride - the 135 is not a comfortable daily drive. I suspect this is due to the run-flats, bit unless you live on a billiard table, it will drive you nuts.

Traction - all that power but no LSD, even as an option. Madness! Those I know who have bought the for any spirited driving have ended up spending $5k on a third party LSD. this is all about protecting the M3.

Looks - err, late '80s Hyundai... Just my opinion

...but I love that engine!

Finally, price: the price difference between a 135 with reasonable options, and the S3 I bought was near as dammit to $30k!!