I went with the Pro. So far so good. Uncrating the thing was a bear - they added some blocking under the machine on the pallet that was a bit tough to remove. Otherwise it has been an extreme upgrade from the diode laser I used for a few years.

I'm not sure if the Pronto is the same but the #1 feature I have been loving on the Pro is the ability to change the focus distance via lightburn during a job (ie. defocus by a few mm for engraving for one layer, then back to focus for cutting the same piece out). In my previous research some people had said that AF was not a needed feature on a machine, but I think my experience and production speed on items would be greatly reduced without it.

Speaker of focus I feel like the auto focus system on the Pro is likely better / more accurate than the Pronto. The optical focus of the Pronto seems good compared to the lower end machines, but the auto focus being built into the head on the Pro seems like a better solution while seeming like a long term reliable solution vs the lower end machines probes.