AS far as the Auto strains the only benefit I see outside is their size. They are small with big hard buds that will yield you 30 to 40 grams if the bugs our critters don't get them first. But they can be very well hidden in other vegatation which makes it nice.
Inside Some grow short and fat. I have others that are 3 and 1/2 to 4 feet tall with less buds.
I pollinated some branches on the short fat ones and they are loaded with seeds. I took a seed off one yesterday and its ready. Hopefully they will turn out like there mother.