People I respect have said they have gotten good results with 2124, but I haven't used it.
I know 2206 makes good lagers, so take that first-hand.
I know WLP833 is the Ayinger strain; Jeff Renner was involved in obtaining it, so he can confirm. I know this strain makes good lagers. I used it in a CAP, and it was great, so it's not just for German beers. 2206 attenuates a bit more than WLP833, but I love the flavor from both of them. Either would make a great beer.
Beyond that, I'm less sure. Except that I thought WLP820 threw a lot of sulfur that wouldn't go away.
Even if yeast strains are supposedly from the same sources, I would always evaluate them. I like some versions from WL and some from WY. It's a personal opinion. Plus I like both groups, so I like to support them.