Hi Fritz
The Sapphire Pro has a resolution similar to the Ender 3 but just does it better and faster!!
We used to send all our 3d printing to a 3d print shop for printing by the SLS process the surface finish was good but still rough and it was costing us more than £100 a week hence our own printer.

The finsh we had with the Ender was acceptable but the new printer is noticeably better. base and verticals nearly perfect but still haviing to hone the material flow to get better top surface, The Sapphire only cost me £11 more than the Ender 3 but is much more sophisticated but still has only a 220 by 220 mm bed.

So far I have printed PLA Pet-G and Nylon PA6 all with no enclosure ( I am waiting for the Perspex panels from my laser cutting friend)