500 pad, then Storm #2, then Reacta Shine.

The Storm #2 and Rough Buff are extremely close, and the Reacta Shine will be close to the High Gloss that Brunswick uses.

The Rough Buff is more of a compound so when these companies use 500 abralon, the RB helps to get the sanding lines out before using the polish.

I just noticed that it is Extra Shine by Storm not Reacta Shine. Any difference?

prmtme,

There's probably not much difference, but to be safe just use a small amount over the #2.  A small dime sized drop will go a long way when applying it over the compound.  Replicating exactly is not really possible since the manufacturers do not use personal spinners, so try your best and tweak further if necessary.

How close would PowerHouse FF polish be to the Brunswick high gloss, would that be closer than the Storm extra shine

Not very.
Both Brunswick's Factory Finish and Storm's Xtra Shine are fairly abrasive. Either would be a very good substitute for one another.

FYI Reacta Shine would normally leave a lower gloss shine than XTra Shine. Xtra has finer and more abrasive polish than Reacta. Storm used to put grit levels on these two but has since removed them. XTra used to be 3500, while Reacta used to be 1500. Please note these numbers can rarely be achieved specifically, but they give you an idea of their relative strength and abrasiveness