I just got this ring professionally casted in sterling silver with a casting company here in the Uk.

I don't know I wasn't expecting the resolution of the 3D print model to be so bad. My resin 3D printer at home prints with almost no visible lines - it is an old 4K machine not even 8k... and somehow their 3D printer that is supposed to be like a super expensive machine that prints with no supports is worse than my £400 hobby printer?

Someone please explain is this the standard for professional 3D casting? The supplier printed in a lower res to save time? The supplier has an old machine but there are machines out there than can print in better res?