Autos + outdoors = disappointing results.
Autos are best for indoors, they really NEED 18/6 to perform to their best potential.
Autos may seem like the latest craze, but in my experience, they do not offer anything that is not already achievable with far superior and much more genetically stable photoperiod plants.
Stick with photoperiod plants would be my suggestion, especially outdoors, autos just don't have any advantages for outdoor growing in my experience.
If you are determined to grow autos, any auto will grow, just let your preferences of effect (indica or sativa) guide your strain choices.
If you are wanting to grow autos because of size restrictions or just want small plants, plant photoperiod plants late in the season to limit their veg time and overall size, this way you will get a far greater yield and reward for your efforts (and in the same timeframe) as compared to growing autos.
Hope this helps, Organoman. (and anti auto flower lunatic!)