This is kinda a tossup. i never play springbreak too much, but haven't done too bad, but I lean towards thunderstruck a bit more because if you hit the free spins, good chances on a re trigger, and even not, if you hit 2 scatters its worth 2x your bet, plus all wins in freespin mode is tripled. I Have hit some nice freespin totals betting like $.90 a spin, winning over $300 before. Also, usually hit for $50-$100 buycks on the freespins alot, but getting the freespins is tough sometimes. Either you hit the freespins like 3 or 4 times within 15 minutes, or it takes you 1 hour to hit them! rof