Hey Drop Bear,
If they had a coat or heavy sweatshirt on I could pull off the one where I utilize the sleeves but the one that I would consider the easier of the two would be the one from the mount. No coat needed, your in a dominant position, etc. Could they be used in self-defense sure but there are of course some better options. I'm all about having a dominant position so if I was on my back I would rather scissor sweep, push sweep, one legged butterfly sweep, butterfly sweep, etc, etc. and get that dominant position. I would probably just strike them unconscious on the street if I was that high in the mount or move to a side naked choke or rear naked choke if they rolled to their belly. Just safer than rolling to my back. Also I would rather have mobility to be able to utilize runfu if I needed in self-defense but hey we do not always get to choose where the battle is going to go. Still I like the triangle from the guard/open guard and the mount for rolling.