I remember in this forum a few years back some folks bought the "Black ball version of Vigma Carom balls". Nobody complained about the balls so they must not be bad.
I looked up a search for vigma on this forum and this is what I found:
The only balls I have personally owned that I would say stay the hell away from is the carom set of balls from China that come in a black box with the white circles on it, a copy of an old Aramith design. First the set I bought had two balls 61.5 and one 65mm. The balls got out of round quick.