not a push so much, but check insurance premiums, too. car payment may be the same, but monthly ins premiums may be different.
DD or Toy?
DD, I'd take ST. MPG, easier to park, full warranty.
Toy, I'd take 'Stang in a heatbeat. 5.0, enough said.
Good luck, but will be fun. Jealous I'm not in your shoes on this one.