Road & Track actually compares a 2003 M5 to the SS: http://www.roadandtrack.com/new-cars/car-comparison-tests/features/a25248/the-comparison-2003-bmw-m5-versus-2015-chevrolet-ss/
With a V8, rear-wheel drive, and stick shift, the Chevy SS is a throwback to the third-gen BMW M5. But is it as good?
The Chevy can’t take the M5’s crown, but not for a lack of thrills. Adjusting for inflation, the SS’s sticker price is nearly half that of the M5’s: In terms of overall build quality, a sub-$50,000 sedan today simply can’t stand up to the flagship shrine of a great brand’s greatest era. For everything the M5 offers in finesse, though, the SS answers in sheer cojones. Both are absolute dynamite.
