Looking at the two jigs the second design has far more versatility because of the pivot adjustment choices. Both are limited in the diameter dish that can be made but the second one can make a variety of different bowl cross-sections, shallow to deep.
You can also add rotational indexing so the jig could also be used for making things like flower coasters or small trivets.
You can also add rotational indexing so the jig could also be used for making things like flower coasters or small trivets.
