are all 12g co2 capsules the same?

[evert]

But some people are raving about umarex Co2, is there any truth in that? Are they cleaner? do they contain more Co2?

Bought a makarov, and with it came some Umarex Co2 capsules.. They have different font, and different neck/seal from the Umraex capsules I already have.
So they might not come from the same maker?