Are all .68 pepper rounds compatible with other pepper guns?

I own a pepper gun from Salt Supply, which fires .68 caliber pepper rounds. But the rounds are extremely expensive if I try to reorder them through Salt Supply.
Lifelite pepper guns also have .68 caliber pepper rounds that are much cheaper than Salt Supply. So I'm wondering if I could order the .68 rounds from lifelite, and then use them for my Salt Supply gun. But I don't know if all of the .68 caliber pepper rounds are compatible with other pepper guns. Would anybody happen to know?

Slat Supply pepper rounds:
https://www.saltsupply.com/products/...r-spray-rounds

Lifelight Pepper rounds:
https://pblifelite.com/products/iner...11554749382699

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Are all .68 pepper rounds compatible with other pepper guns?