The V in GBV actually stands for versitile.  Though the literature that is under the antique ball section of ebonite's site says that the infinite one coverstock is only the gb 12.1, the logo on the ball says that it is GBV 12.1 (as well as the release description).  The Versitile portion of the name was added when ebonite claimed that the surface of the GBV was more responsive to surface adjustments than the GB.  The covers on these balls are different. Though they may share the same base, they are quite different and you can see this difference on the lanes.  Changing an oil absorbtion rating is not the same thing as changing the out of box surface grit, it is actually a change to the composition of the coverstock.

As far as drilling instructions go, I would expect the drilling instructions of the NV and One series to be the same thought the cores are different.  If you know anything about drilling it is that the drilling process for symmetrical equipment across lines and even companies is basically the same, as it is when considering asymetrical equipment.  The only major variation when considering asymetrical equipment is what axes the asymetry is on.  A core like the Brunswick asymetrical core is elongated along two, while the vanguard core from morich is actually along three.  These two lines will have some variation.  I personally feel as though the Zone line has more of the properties of symmetrical equipment while the vanguard core must be drilled soley along asymetrical standards.

One more thing the Black widow does NOT have the same cover as the one.  That is a fact.
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