Help me understand the different "gold" markets

I refer to Netdania for gold prices in USDs - https://www.netdania.com/comodities/xauusd/netdania_fxa

I always assumed this was the "Spot Price". Attached is a screenshot of today's chart. at 11am eastern. This is very different from the PMBUG Finviz quote which is a quote of the Commiment of Traders (commercial hedges, large traders and small traders). At 11:10am eastern there's a $40 difference in price (commercial hedgers)

Mostly I'd like to know what the Netdania quote referes to.

If the answer is very complicated don't bother, but I would like any little tidbits of info you can provide.

also:

What about teefus and chainz?

Since I discovered X these reports have become my first source in order to learn the real silver spot and futures price, real because it refers to bullion.
Imo this guy is making a huge service to the gold & silver community - for free!