I tried to read all the posts, I do know 24 hours a day light will finish faster (obviously). Alot of people dont run 24hrs for multiple of different reasons. It makes a mega difference in finishing time vs. 20/4, 18/6 or even 12/12. I'm finishing up an auto tomorrow planted 1/15/21 on 18/6 schedule very pleased with it so far. amber trichs the fade etc... Hoping to keep that fruity smell post chop (I've had issue with that)
As for difficulty level photo vs auto, I dont see it easier or harder they both have pros and cons. If a noob asked me what to start with I would say auto because the length of time for a photo that's all. The longer any cannabis is in the pot the more time you have to f*** it up