The finish depends on the product - it is more a technical than a quality choice. A thickwalled piece like this could be finished with pliers to get a rounded feel to the neck - and in that case it will also have a pontil mark. For the sake of economic production the glassmaker can decide to forego that operation, and finish it by grinding the top smooth. It does away with the onerous operation of taking it over on a pontil rod and a secondary (expensive) glassmaker operation; instead the piece is cracked off and annealed. In a later operation the neck is ground smooth by a low paid minion. There you have the option of leaving a straight edge which is prone to chipping (you may have noticed it is almost impossible to find an unchipped piece of cut glass - especially panel cut), or chamfer the edges which really is no big deal if you have the proper equipment. I think fire polishing is more of an issue in thinwalled items. And as always, if the glass makers did not finish the rim off properly - i.e. coursely ground instead of polished (use your nail for testing), do not buy it.