I have two carniolan, and 2 italian queens. I can not tell the difference by looking at them, they are both very dark like the queen you have. From what I know about other insect species, and Tarantulas, judging a species by color physical appearance is spotty at best.
I honestly think that the queens we have may be a bit of both :p [italian and carniolan, or whatever... Since I know mine are not instrumentally inseminated, that is no way to concretely guarantee the race of queen and offspring.]