It's Xeon 'W', not WS :- ). Big difference actually, they're lower clocked single-socket LGA2066 platform chips to meet smaller thermal footprint (to fit into the all-in-one design).
The 18 core Xeon W-2195 is basically Xeon version of i9 1980XE, -10perc. the clock, and only 140W compared to 165W. Less power for the same humungous price (2k euro).
Since base-score of i9 7980XE is 3300 Cinebench R15 multithreaded score, the Xeon W-2195 would be roughly <3000 points +/-. That's performance you can get with 800 euro costing 16-core Threadripper for comparison, but the Intel can utilize instruction sets probably better so it might come ahead of it in Corona and other Embree based software.