My driller just punched holes in an Onyx Vibe and a Blue Vibe to do a direct comparison between the two. Looking at the reflection of the lighting off of the surfaces of both, the reflection is crisper on the Onyx.
OOB the Onyx appears to be shinier than this particular Blue Vibe and the balls enforce that on the lanes as well. His Blue seems stronger than the Onyx.
His plans are to hit the Onyx with 1000 and 2000 abralon, then repolish it to see if the Onyx can really be neck and neck with the Blue.