outdoor newbie

So this is my second grow. Long story short I just wanna know why one of my plants seems to be growing outward (stretching branches outward) more than the other witch has its branches more close together and an all around looks "bushier" is there a reason?? I don't know if you can tell from...

im doing it tomorrow their getting too big for solo cups roots a busting through so I put three out today so far so good tomorrow im putting a few more in just moving slowly and watching a lot cause they die im screwed no harvest anyone in Vegas deal with this Vegas heat?