Actually I would say it's a little better due to new abilities like Zombie Crush and the new guy's Uppercut move, plus the new weapon and gun types in the game. You can get a chainsaw early one without fighting Jason, for example. Oh, and you start with 15 skill points so you don' thave to slog through the lower levels.
The mechanics are pretty much the same, but as the post above says there have been a few improvements - more types of weapons as well as weapon skill bonuses that increase as you use particular types of weapons more. Certainly no worse than the original Dead Island