Sorry, I didn't realize you had asked a question. I'd say the buds were more dense with the 315 and of a better quality with regard to health, looks, secondary characteristics such as smell etc. I will admit the bud being visually smaller, maybe somewhere in the 5-10% zone. But the overall yield went up. I was able to get 16oz out of a 3x3 tent with a 315, but was averaging about 24oz with my 600 in a 4x4. Stoner math comparisons, I get it. But the difference was clear to me. I am now looking into strips or quantum boards for my next adventure. But I'd be VERY happy if I only was able to grow with 315's for the rest of my career.