I have discussed this matter with other participants at the conferences. Bringing up stuff up to the counterweight at GEO means only to pile stuff at that altitude. The CNT tether, just like the SpaceShaft only brings things to a certain altitude from where they have to be launched.
Only Rockets are capable of fulfilling both requirements. That is; bringing a payload up to an operational altitude and giving the object enough velocity to make of it a satellite capable of counteracting gravity.
I will like to point out that in the event that deployment of a CNT tether to GEO Is unfeasible the only “plan B” out there is the SpaceShaft. It may not be as sexy as the popular system but it will work.
To your question: Basically it accomplishes the same thing.