...My understanding is VOB is the number one selling Bourbon in Ky and almost unavailable outside Ky...but, that RR1792 is very similar (haven't seen VOB so can't affirm that)
VOB is available in Tennessee in 80, 86, 90 and 100 (BIB) proofs, in all sizes.
Frankly, I find it kinda ordinary, and not like Ridgewood (the only bottle I have open) Reserve at all, which I do like (though not love). Bill Friel, Barton's retired master distiller who 'designed' RR1792, told me at the Festival last year that RR is a marriage of three different mashbills -- only one of which could be VOB.