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wrote:

So what if anything is the difference between different brands of PVA?

Concentration and components. In particular the woodworking-specific
white PVA glues are often a mix of PVA and aliphatic resins (the
"yellow glues"). You may also find additives to reduce "chalking"
(poor performance at low temperature), to reduce the quick drying when
exposed to air in an open bottle, borax to improve initial tack, or PVA
(polyvinyl alcohol this time) to make a "finer" and less viscous glue
for modelmaking.

Builders' PVA has none of these - it's just plain cheap PVA. Sometimes
there are anti-frost additives.

I normally use hide glue for woodworking. When I use PVA it's either
Titebond II or cheap builders' PVA for biscuits and some veneering
(applied cold, dried then hot pressed)