They were actually close to each other........25% of the Zsweet Inzanity were the tallest, close to 7 ft. Most everything else in both strains was between 5 1/2 and 6 ft. Ethos concentrates on sativa's and sativa hybrids, so most of their stuff will be on the taller side. Everything basically goes into flowering after 4 weeks, so nothing gets an extended veg period. Regarding yield, I often pull a plant or two if they turn into runts, or has some other issue so you have to make sure it's apples to apples plant count wise. Thinking about it all, Zsweet did yield better than the Chem OG, but not by much overall. You also have to consider how much is left on the plants after flowering, and I think I left a lot on the plants when trimming. If you are willing to let the plants finish off the buds not ready when trimmed initially, you can probably add another oz. per plant in both strains.