IMHO, both these datacenters show much better results for the keywords I monitor.
My sandboxed sites got out yesterday in the 126.96.36.199 datacenter and today I notice that half of the pages (keyword combinations) are back in sandbox.
But what I was seeing yesterday at 188.8.131.52 seems to have switched over to 184.108.40.206 (where my entire sites are again out of sandbox and roaring)
So guys, if you want to check if you sites are outta sandbox, then 220.127.116.11 and 18.104.22.168 are the IPs to watch.
I also noticed a few other sandboxed sites (watching like a hawk, but not owned by me) fall down further on these IPs.