Similarities:
They all seem to have a similar valve on the bottom.
Most have the same piston.
Some even have the same handle.
Buzzy's Polinator looks kewl b/c it has a short tube so you don't lose much air when you put on/take off.

This Manitou pump looks like Buzzy's:

Yet this Manitou looks basically like my wrench force with a different handle:

These are the same as the second Manitou and my Wrench Force:
Fox

Eko

Marzocchi

Rockshox
The only ones that look all that different are:
SKS:

Topeak:

Planet Bike:
Who cares, right?
My beef:
1. My Wrench Force slightly leaks at the swivel joint.
2. I need to lube the piston valve seal occasionally.
3. My biggest beef is that they don't measure in small enough incriments. For air assist, they should be able to be accurate down to 5psi.
4. Who really cares, right? Just air it up and set the sag with a zip tie.
Still seems cheap.