Wow all these where started at the same day? The White Dwarf looks like it is flowering already.
Anyway the genetics are different, Indica / Sativa ratio too as well between NL and White Dwarf.
From what I can tell from this photo, my NL at day 32 looked more like your 3rd one. I guess you are looking at about 2x the height you have now. From what I read, plants from seeds, don't turn all the same, even if raised in the same conditions, that's why clones are preffered from growers with a big grow.
Definitely flowering going on. The smallest one isn't showing much in that arena either. I've actually considered euthanizing it or giving it to my friends as a houseplant and telling them to put it by a sunny window.