Tracks: BTD3 has 8. DTD has 3 (I think). Winner: BTD3. Upgrades: BTD3 has split upgrade paths, making it easier to increase stuff when needed to. DTD has 1 upgrade path. lame. Winner: BTD3 Graphics: BTD3 has bright, cartoonish graphics makeing it awesome. ( it also has monkeys.) DTD has pen-drawn, dull graphics. BTD3 wins. BTD3 has messages at the bottom of the creen after a level. DTD has nothing. on BTD3, you choose when the ballons go. on DTD, it has a timer. on BTD3, the upgrades are instant. on DTD, you have to wait for the upgrade to take effect. BTD3 Wins.