Subsidiary companies don't necessarily share coverstocks or even urethane/resin suppliers.  You can't say "RG is owned by Storm, so Ultimate Vision must be Storm Coverstock X only renamed".

Sometimes that is the case.  Powerplus and Superflex were pretty widely believed to be the same coverstock, as were PP EX and Enhanced SF.  Also, when the smaller companies aren't owned by the larger company, but merely manufactured by them, the covers are often the same or tweaked versions.  A lot of Lane 1 balls had PK18, PK17, and Activator covers, though later you'd see blends of PK18 and Activator (like the Hybrid Dirty Bomb).  Likewise with Morich: some used standard Brunswick covers, some were tweaked.  The particle additives were Mo's own, I don't believe he used the same particles that Brunswick used.

SH