The ESP Guitar Company

So I just got Irig and was noticing that the demo versions of these apps aren't really giving me any incentive to buy either one. So Which one would suit music like Skillet, GnR, Red, and War of ages. Granted I know these are nothing more than simulators, so I know they won't sound like the real thing and I also know there's more to it than just a guitar and an amp. Its about someones passion for it. So yeah... Tell me which is better!