Performance wise its obviously the M3, daily driving its probably the 335. I know the M3 works well in stop and go traffic too, but the thing is a gas hog. I'm currently averaging 12.1 MPG on my M3 which means I'm almost going to the gas station twice a week. But hey, I didn't buy the car based on its fuel efficiency. If I did I would probably be driving around in a Prius.
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