Lower engine power, faster times. They put their engines to work.
Also, no offense to JCH13, but I would never get a MS3 as a daily driver. I've driven one, and the first thing you notice is that insane torque steer when the turbo kicks in.
*shrug* with decent tires I hardly notice torque steer. Even then I only really notice it in 1st and 2nd, gears rarely driven in during a commute. Again, if it's an instant deal breaker for you, oh well, but it's not a big deal at all IRL.
I'm not really getting bent out of shape over it. I just don't see the reason to pick a mazda 6 over say, an accord or camry. If all the cars perform the same in circles, but one is better in a line, pick the one that's better in a line.
I really, really like Mazda over Toyota or Honda. I feel they offer an economy car that feels better than the other two. But, at least with the non-speed Mazdas, they have always been behind in terms of power.
In terms of fuel economy... I've never seen majorly poor economy in higher-powered cars. Drivers make more of a difference than engine type, in my experience.
Um, I think you answered your own question. You also answered it earlier for yourself: the Mazda has much better styling and a better interior. And like you said before, you won't be taking it around a track, so will you really miss that extra horsepower 99% or more of the time?