Hi
Essentially they are the same in the respect that the mounting bracket at the top is the same size. However, there are two types i have come across in my time - one with a cut-out to mount the BeoLab 7.1 support plate into, and one with a plain pole and no cut-out.
Always totally unplug the TV before plugging in the motor stand by the way - you can cause damage to the TV if you plug it in with the TV powered up.
Lee
BeoWorld - Everything Bang & Olufsen