Does the 328i have the sport package, at least?
If not I would go for the coupe. It's not the latest generation but after owning a sport package BMW, I would not want to give up the seats/shifter/steering wheel that come with sport/M sport...
2011 BMW 335i E92 - Le Mans Blue, 6MT, M Sport. JRZ RS Pro, Quaife LSD, BMW Perf Exhaust