The kens and other GDP cuts ive seen will be almost the same, the difference is kens gets that skunky smell and others where straight fruity pebbles. They will yeild low if you dont dail it in. If you run 9 per light, top 2x, lst a little you can get them over 3oz each and hit over 1.5 per light. My best with kens is 1.75 and its not easy to do. Then when you get those buds big and chunky they try to mold on you and you have to chop at 8 weeks. I hate growing GDP im moving on to some kush cuts. LOL
I also picked up a purple cream cut that shits all over kens for quaility, but vegs so slow, Im sure it could be erkle or very close to the same? Its got some long skinny leaves that look sativa, but the nug is straight indica, wierd. Ive never seen erkle so i dont know what its leaves look like, but if they are the same, maybe there is a runt sativa in the genetics of these purples.