Sorta depends on how you define performance. If you mean group size only, then the added cost may be of questionable value.
However, if you factor in barrel/cylinder/sight/grip configurations not available elsewhere, special finishes, smoother actions, nice case, and higher resale value... then yes, they are worth the $250 bump in price.
I currently have 4 625's in different configurations, 2 are PC models. Heaven forbid, but if I should ever fall on hard times, the PC models would be the very last to go.
Good Luck...
Joe