
As you can see by the photo I've got a Vario and a Compak K10 WBC. I purchased the Vario first and like you questioned that if I "stepped-up" would I be able to get better results.
After endless rounds of dd I finally decided to purchase a WBC from CC; figuring that if it wasn't better than my Vario I'd simply return it. I know, my bad, but I'd be lying if I didn't mention that that thought crossed my mind and used it as a justification to purchase the WBC.
I've been running these grinders for ~ 3 weeks now and sometimes I have a hard time distinguishing which one produces the better cup. However, when I get everything right, or darn near right, the WBC produces a cup that puts a huge grin on my face and reaffirms that I made a simply brilliant purchase.
Was the WBC worth the $800+ premium over the Vario, probably not, but I've found that if you judge everything by price alone; you're bound to live a very boring life.