In my eyes, these are very good pictures. T2 and T3 about rough terrain, T4 about use of hands, T5 T6 gets steeper. The T6 one Iād term use of hands for comfort 
Of note ā the only picture showing a path is T1 one ā this looks similar to the S0 one to me.
The S1 picture and text already have too much loose rocks in there for me to comfortably tag sac_scale=hiking there. And for me this should also not be recommended by a foot router that aims for the general populace.
The picture above I once used for a poll in German category: Whether that shows sac_scale hiking or mountain_hiking. Most went with hiking, because there are no mountains there and because what else other than hiking would you want to do there.