What ammunition are you going to feed them that brings you such concern?

You’ve been here long enough to know these are not promotional ammunition guns. Unless you load it yourself, you will have a bit of an Easter egg hunt for ammunition. Big deal. Use your other guns when things are lean on the ammunition front. Buy a US made pump, and make sure you post a photo of all three of them, here, so jOe can add commentary.
Having said that, I’d guess even if it were an issue, and you were forced to use high pressure promotional stuff, it would take you more life than you have left to wear out a pair of guns. That path might nick your gun conservator legacy, however.

That is a cute little first world problem to have. I am convinced you will manage, matched pair or not.

Good luck.

Best,
Ted