No comparison, and no choice
Go with the 'Speed3!
Coming from an Audi A4, I really doubt that she will be happy with a Mazda2.
Yes, the Mazda2 is cute and a neat new platform, and the accessory and parts options are there for you to develope,
but not as a daily driver and play toy.
I have often considered a 'Speed3 myself.... although front drive, I am ok with that and love the performance right out of the box (pun intended