It's like eating cake with a fork or a spoon, at the end of the day, you're still eating cake.
I really feel like it's 100 percent personal preference. Both have their adv/disadv. I had DCT on my iS before my m3. I didn't really care whether my m3 was 6mt or DCT. Either way, it's a hell of a car. Plus, it's the driver, not the car, that makes the difference between the two. I just think you should ask yourself why YOU want a DCT or 6mt, not care what other people's opinions are. It's your car for you to enjoy! you'll love either