The base package Mazda2 is the sport package. The uprated model (for either model, really) offers more baubles, but no more performance. (Though I admit I miss having cruise control.)
I'll save weight everywhere I can, which was the big reason I picked the 2 over the Fiesta in the first place.
It's fun to autocross, even with no "official project car" potential. I'll be making a few choice upgrades anyway.
Re: Fuel economy- For what it's worth, I'm beating the hell out of EPA estimates. Worst in-town tank was 30.7, best tank so far has been 38...and I don't hypermile. Not as good as the Hyundai, but I'm very very happy with my Mazda2. YMMV.
I tried drag racing, but kept blowing the apex for turn 2...