I like doing comparison like you mention as well. Sounds like its about time for a bulb change brother man! How are you liking the feeding aspect of coco versus soil. I got tired of mixing nutes everyday when I was in coco. Soil fits my laziness way betterBuilt two wire cages today, and will built two more tomorrow. I'm finding cages work well , keeping buds in the light. These were an attempt to mainline clones. The tops of the ones I got finishing, in two weeks, and the one hanging. the hanging Indica should be smoke-able soon and If it's not potent, (which I suspect), then I've got a 4 week old Cherry pie seedling, ready to replace it. Both bulbs in the 630w cmh light, are at least 7-8 grows old, but seem to be working.
Will be interesting to see the difference in yield, between coco & COM Stonington blend super soil. I'm betting on the coco. They're two weeks old today. That's 5 gal bags of coco, and 10 gl. bags of COM Stonington blend. Will also be able to compare the difference in final product, taste, smoothness, etc..