Hmmmm..... well damage being the number one criteria, I can see the slam counting for more than control time. The problem I have with this is the slam lasted 1 second and had no impact on either fighter (as far as we can tell from her example) whereas the 2 mins of ground control had a lot of effect on one fighter morally, and gas tank wise. Neither of them did any damage to speak of.
You can argue the slam caused, technically, more pain than the control, but the difference is marginal and possibly unmeasurable. The control may have done more "damage" to that fighter's ability to continue fighting, even if it's only by tiring him out. Likely the control time had more damaging effect to the opponent's efforts to win.
If we change it to the same slam followed by 4.5 minutes of control time but no damage, would they see it the same? If so, then controlling someone for 14:30 of a fight means nothing if they landed 3 strikes on you and you landed none on them?
I think most fighters would rather be slammed once than controlled for minutes of a round and that's why Sean was grabbing the fence and grabbing gloves throughout his fight with Yan - to avoid being controlled on the ground. Obviously it's something fighters don't want to happen to them, and I think that's a lot more grueling than a quick slam with an immediate recovery.