Hey GHOPZZ. I've grown both. I've had great luck with the Nirvana PPP. It's a forgiving plant and a good producer. I think I got 12 oz from 3 plants on my first grow ever. It's not killer weed, but it is better than anything I've gotten on the street. I had a real hard time with the GHS Trainwreck and could not get ONE seed to pop. Probably operator error though.just seeing what everyones thinks of these two strains. im trying to make a decision between the two. how easy are they to grow, how do they yield, and which one is more potent. im looking at greenhouse trainwreck or nirvana's pure power plant