A County-class Exeter changes damage, not River Plate's result

If York and Exeter had not been built, what might replace them and how would that affect the Battle of the River Plate?

An additional or improved County-class cruiser could add speed and two more 8-inch guns, probably damaging Graf Spee more without changing the overall result.

Cancelling the York class would probably have produced at least one more County-class cruiser, perhaps retaining the names York or Exeter. In the River Plate scenario, that ship would be slightly faster and carry another twin 8-inch turret. The officer directing Exeter's surviving after turret might then have controlled two turrets and placed more hits on Admiral Graf Spee. The broad result would probably remain the same, making this a bounded counterfactual about damage and combat endurance.