A proper meth setup is anything but a bandaid. A meth kit was the very next mod I was going to install on my old DSM before I sold it. I could have gone from running ~21 psi max on pump gas to running 26 psi with more timing. Would have been good for another 40-50hp and 60-70 tq. That sort of setup is what meth is really for, although I agree that I've seen some people use it to bandaid bad tuning. Although if I built a forced induction car from the ground up now I'd do a dual-fuel setup. Much more reliable and much better control over fuel delivery.

To the original poster- I wouldn't buy either of them. Buying somebody's modded car is never a good idea in my book. Sometimes you get lucky and they did everything right and you pay pennies on the dollar for all the time and money they sunk into it. Most of the time they did everything wrong and you spend twice as much time and money fixing it as it would have cost you to just get a stock car and mod it yourself.