The Sport-Mechanic Work stand is sturdy and strong, lightweight, easy to set up and easy to put away. It will likely last for many years even with heavy use, which makes it a good investment for a committed bike mechanic.
This Feedback Sports stand has knobs at the base that control each of the three legs. By turning the latches on the knobs, you can fold it up tight, and stow it away in some corner. It weighs 12.8 pounds, which makes it easy to move around. Folded dimensions are 6.6 x 5 x 44.1 inches.
Most other repair stands have two L shaped legs that cannot bend unless you detach them completely, so the tripod design of the Sport-Mechanic Work stand is a definite advantage over competitors.
This stand has a clamp head that can turn 360 degrees (most bike stands can do the same), but unlike the competition, the clamp is only 3.6 inches long. This allows for clamping on bikes without having to adjust the saddle height- not a big deal in itself, but a very thoughtful design feature that saves you time and effort.
The design of the clamp is simple and intuitive, and it has a crank with which you can open the clamp with just a single flip.
The stand can hold up to 65 pounds (most mountain bikes weigh around 40 pounds), so it will easily hold almost any bike you put in it.
The Bikehand Pro stand holds bikes up to 55 pounds. Many parts (like the clamp) are made of plastic, so if you don't exceed the limit, there is little chance of anything breaking or slipping.
Though the clamp head can rotate 360 degrees, it's not recommended that you do so while your bike is clamped in, since it does tear the plastic teeth of the clamp.
The clamp jaws on this stand is 3.5 inches high, and the opening can be adjusted with a cam to fit almost any width of the seatpost tube. It's unlikely that you'll find a bike that can't be held in this stand.
The PCS-10 has a 3 leg system, with two of them folding out in an L shape against the floor. You can attach any bike by the seatpost and be sure that the stand will hold it well. The stand can hold up to 100 pounds, which will do for the vast majority of bikes out there, even electric bikes.
This stand weighs 25 pounds, which is not the easiest to carry around. It also doesn't stand up by itself when folded, so you'll need to keep it either leaning against something or laying flat.
There's not enough clamping force in the clamp itself, so you'll be tightening it with the handle constantly. There is a winding lever to do this, but you might be left holding a possibly heavy bike until you fidget with both the width and clamping force of the clamp.