Hi i have white diesel autoflower in a 1 gallon pot under 100w cfl.. its now day 20.. I know 1 gallon is small but its due to insufficient funds but I dont see any white pistols i think its really short too :/ im not too sure tho.. heres some pics ↓
An afterthought: It seems to me you could probably look at the stem and see how the leaves are positioned. During veg they will be in pairs (together on each side of the stem). Then during flowering the leaves will be staggered during what is known as "the stretch". The difference may be subtle at first, something to watch for though. Autos do the same thing but not so pronounced -- if memory serves and I'm pretty stoned.
LOL wait a couple months and I will tell you. Anyways your mileage may vary..