ok, I'll keep at it then
The reason some people get better results from synchromesh is because it has friction modifiers to help with synchro and blocker ring engagement. It is thicker than the recommended oil, and does not have an anti-wear package (I'm not sure if this is due to the friction modifiers).
Synchromesh is $10/quart
g052171A2 is $25/quart (from 1stvwparts.com)
So the VW fluid will cost you $45 more.
Is VW secretly trying to make millions of of an obscure transmission oil? Doubtful. Every once in a while you get what you pay for ...
This may be anectdotal, but the VW lube is very similar in base stock and add pack to the extremely high-quality spindle oils we use at work in 20,000rpm spindles in our high-speed machining centers.
When I tried synchromesh, I did not get better results, but it's cheap enough to give a try - if it works there you go - if not maybe you'll have to pony up the cash.