The tall ones we call glue leaners will show more dominant glue traits and that, more open structure that will promote more light penetration, more open branchy leggy, way less leaf... Needs support like glue.
The stockier ones are a deeper sour bubble type smoke generally, and many have shown extreme resin production, so dont sleep on them. We call them super sour bubble phenos
because it is like a sour bubble with unlocked vigor instead of 2x slow veg sour b is known for. They produce thick dense heavy flowers that reek. Minor staking needed due to massive weight of the flowers even with the thick stems heh. Dansbud GB 8 I posted is similar pheno to these stocky ones. Also that sexy ass GB 4 of his multiple POTM winner is from the stocky side. I like to defol these in veg to help em beast out. You will get nice thick ass stalks but still need support at the end slightly hehe....
I made the bx1f1 so we could still look through those stocky ones easy, similar to the original f1 cross, sort of a redux, bx1f1 showing more vigor than the f1 for sure. the pure bx line is getting more glue like as we go. So depending on yer wants.
Whenever I get to make the bx4 I will do a bx4f1 as well to be able to compare and test for homozygosity. I'd like to see a good close to 50/50 ratio in that line eventually with more work.
The Bx 1 would like to see breed true to the glue side in the end. We'll see