I thought there would be a lot more variation than I am getting here. The only individual that appears different is one dirt-growing Royal Purple Kush that is slightly smaller than its duplicate, but I think it will catch up with the rest. The other RPK and the Papaya all look identical. This is the first comparison grow I have done but it shan't be the last.
Strains: 2 (I am really testing the RPK. I am growing the Papaya because I always grow Papaya.)
Light: Same for all, 430w Agro HPS in approx 2' x 4' space
Sowed: All same day
Popped: 2-3 days
Container and ferts: 2 RPKs in 3 gal each of FFOF dirt, 1 RPK and one Papaya in 14 gal Rubbermaid drip tank
Watering: Tank drained and refilled once a week, pots watered two/three times a week (more often if the dirt looks dry)
Media: Different, of course (see Container, above)