The high from an auto is more euphoric and more complex, just my opinion everyone is different but i have read this before from someone else. The best photo strain i've smoked was from a sour diesel i rate that at number 10 with photos,never tried an auto sour diesel let me know how that turns out if you remember. The highest thc auto ive tried was about 8.7 but the high was somewhat better with the auto if that makes any sense. The highest thc auto strain i've grown so far was from an auto called "think different", beautiful plant. I couldn't have designed a better plant.Believe it or not, I've never smoked an auto strain before...I know. Pitiful. Hoping to try one of my homegrown creations (Sour Diesel Auto) this Summer after it's harvested. My mouth waters looking over these threads at everyone's plentiful harvests! I've just got one Solo cup's worth but I'm looking forward to it.