Version Comparison Chart
The basic difference is this:
Our Heavy Duty Version uses T-Nuts that slide in the channel grooves of the vertical column. The position locks are both located at the top of the slide bracket. This stand is fine for lighter weight cameras and cell phones.
Our Super Heavy Duty version uses a bearing slide that encircles the vertical column giving the camera arm smoother up and down movement. The placement of the position locking nuts also makes the camera arm more sturdy and controls camera wobble on larger, heavier cameras.