It’s the I4 for me. Same AMG powertrain as in my wife’s GLA 45 which is plenty quick, very comfortable and capable at 120+, and has been bombproof. Hauls ass when you want to, 30+ mpg at 80-90 mph.
With that said, I have a Cayman S (987.1 with 55,000 miles) 6-speed thats been my daily...