[Jizvonius]

Hydraulics are the better choice if you want more precise motion control as you won't have to deal with the high compressibility that gases have. The downside to hydraulics is that you will have to run a pump for every movement as you can't store energy in compression of the fluid as you can with pneumatics.

Both systems can put out the force that you need. You can get the partial stroke movement using pneumatics with the correct valve, but you still don't have precise control of position or velocity.

My vote goes to hydraulics. Just try to find a relatively quiet pump.