With food and drink, a lot of items are made in the same factory with either identical ingredients or very slight changes.
Like M&S and Copella apple juice is exactly the same, but tesco might be in the same factory, but will have more 1% more sugar. Petrol is another good example.
I would imagine there's not many factories producing airsoft green gas, so I would wager it's the same base product with maybe a minor amount of silicon difference.