I have yet to see a single dock for the 700 that has the contours for the 700 fit exactly in the dock mechanism. Seems to me like they are all one curve like the 200 is, not angular like the 700 is.
There was a post kicking around about the internals being identical, battery life being different because of power draw by the beefier tablet is greater than the older one. For now the 200 dock is all we have, however its labled.
And to anyone that says they have a legit 700 dock, dock your tablet, look at the dock mech and see the gaps between the angle of the base of the tablet and the smooth curve of the dock mech. Congrats, you have a 200 dock. If yours is a perfect fit then pics or it didnt happen.
If what I said was remotely helpful the thanks button is right there, only takes a second.