Why licensed Krupp and Harvey armour was not identical

Did every navy using Krupp or Harvey armour pay for the same proprietary product?

The names described licensed process families rather than identical plates, so ingredients and local variations could produce materially different results.

Krupp and Harvey armour names identify families of manufacturing processes rather than perfectly uniform products. Differences in ingredients and local practice could change the quality of the finished plate even when producers worked under the same broad license. Those variations could sometimes be advantageous rather than inferior. One example, recalled cautiously from memory, is a Japanese comparison in which an Austrian producer may have outperformed Krupp itself. A famous process name does not prove that every navy received technically identical armour.