There really is not hobby consensus on what constitutes a complete...as in master...set. By some accounts it is north of 575. Admittedly some include recurring print defects in their determinations. You could use the SCD or PSA registry checklists, but there are certainly some who think those lists are incomplete. As an example, how many variants are there of the House and Campos cards ?
We have several avid collectors of the set on this board, some in this thread.