Wilson Sasha DAW vs. Sabrina X

Wilson is a quality speaker manufacturer and has a house sound. I expect there to be a difference - I can’t say if it would be worth the money. And I’d be willing to listen and find out. 

Is he running the subs under the mains or using the Lokes internal highpass? If he is highpassing at or above 60hz I would pass and save the money. 
 

the Sasha are a lot more dynamic but once highpassed the dynamics of the Sabrina should be greatly increased. Larger speakers are almost always better but subs used correctly make such a difference it might not matter. 
 

the Sabrina’s measurements show cone break up in the mids, or a least a very strong peak at 3k off axis. Oddly people don’t seem to complain about it though.