I think there’s probably enough info on here and elsewhere to easily answer that question if you do a bit of searching, but I would think bushy plants that respond well to topping would be a telltale sign in veg. Here’s some info about the Kush 4 phenos and links to my original tester growlog:
I would take clones of every female plant if you can, and try to make a few seeds so you can revisit it later. Clones are a lot harder to keep around than seeds… 
Best of luck, and let us know how it turned out!