is there anything else special besides the pump?
You got a facelift! Didn't recognize you...
1) With true PWM it would have been different/special
2) the EQ Pad is different- some would argue special
3) even without PWM- if they get the voltage output right, they will be in a very small group of devices that can regulate output in percise 1/10V increments
RE the Feed system- there are other things like it- but they are manual and don't have the percision setting that this device has- most of the bottom feed devices allow you to fire and feed at the same time. You could say this raises the bar in that area by adding a pump and the shadow feed adapter.