Lowryder #2s one short and fat one tall and skinny

hi all been growing these two lowryder#2 for five weeks side by side since seedling in soil under a 250w hps but as you can see there completely different sizes ones 16" and the other is 27" any one know why, is it something i could have done or is it in the genes?

Although the strains may be the same and may have come from the same vendor, there can still be many different phenotypes to it. Many strains aren't pure indica or pure sativa, but rather, a mix of both depending what characteristics the breader is going for. Most likely the seeds came from the same breader but different mothers.

Also...its a plant...no 2 plants are alike

Unstable hybrids, not uncommon. The taller one will take longer to finish, looks much more Sativa dominant... look on the bright side, you have the best of both worlds now

I just grew out two Northern Light autos. One was short and fat, the other was tall skinny and purple...

Thats all really good to know, thanks for the response this is the kind of info you just cant get from google thanks guys.
and im quite excited by the fact they may smoke different as webbly suggested,
also how did the two nl autos turn out by comparison