Out of curiosity - in the rooms associated with Meta Stack Exchange, is there some difference between tag mathoverflow and meta-tag mathoverflow?

edited: Out of curiosity - in the rooms associated with Meta Stack Exchange, is there some difference between `tag` [tag:mathoverflow] and `meta-tag` [meta-tag:mathoverflow]?

said: Out of curiosity - in the rooms associated with Meta Stack Exchange, is there some difference between `tag` [tag:mathoverflow] and `meta-tag [meta-tag:mathoverflow]?