I'm looking at either the S3 or the CLA45.
MSRP: $42,000 est v. $48,375
Available: Aug/Sept of 2014 v. Nov 2013
HP: 296 v. 355
0-60: 4.8-5.0 v. 4.2-4.5 est.
Trans: 6 speed dual clutch or manual v. 7-speed dual clutch
Weight: 3200 est v. 3600
Drive: Haldex AWD v. FWD with up to 50/50 split
Sound System: band & olufsen v. harmon/kardon
Styling: Personal take is the Audi is getting a bit plain looking while the AMG is a newer style and more special.