Originally Posted by SgtThump
I don't have a 600 series boom stand, but in general, a main difference between the 600 and 700 series seems to be smaller diameter tubes (and lighter weight) on the 600 stuff.
The hideaway tilter on the 600 is different too. The 700 series has separate adjustments for the angle and boom extension adjustment. Meanwhile, the 600 only has one adjustment for both, therefore it's a little sloppier.