I actually did, i just never posted the other side of it....
I don't believe it's much stronger because of the cells. I personally believe that his eyes have two different abilities, like all other sharingans.
Kakashi has the ability to wrap things at a distance and himself in to the other dimension, wither as Obito can only wrap himself and thing that he touches....
However... What makes his ability so effective. Is that fact he is able to stay physically visible while his actual tangle body is in another dimension, this gives him the advantage in seeing his opponents, giving him a better chance to strike and counter.
Kakashi may get to the stage were he is able to enter and exit the dimension instantaneously, however.. He might not be able to see what his opponents are doing, due to him not being able to see what's going on in reality.
That is my opinion...