Underpinner - AMP vs Cassese

Hello All!

I posted this previously but now realise that I may have created the thread in the wrong forum section.

As things stand right now in my workshop, all of our equipment is geared to a manual operation. I am looking to upgrade the machinery to ramp up production, and have been researching pneumatic underpinners as one out of the few required upgrades. I would appreciate feedback about the best brand etc..
The most popular one i have come across so far is Cassese, followed by AMP. Can anyone please say which one is better and why?
I have created a poll so people can vote, even if they don't leave a response.

A few questions as well...
With Cassese, what is the difference between the Cart and the Uni? I am looking at the Cassese C20 or CS2 UNI - again, not sure what the differences between the two are (if any).
With AMP, I am looking at the U-300P model. AMP seems to be the more expensive brand, so this is the only model close to my budget (outside but close).

Can some feedback/guidance please be provided.

Thanks!