Thanks for the insight. It's always interesting to me to hear about these things from people in other countries. FWIW, I don't think the B&K uses a true differential design but a nice product nonetheless and as you said, the voltage flexibility is quite a boon. Best of luck to you over there.
another variation of that joke is "What's the difference between an audio saleperson and a used car salesperson?" The used car saleserson knows when he's lying....OK, you guys selling audio...relax :)
Dealers lie like rugs. Reminds me of when I once bought a Ford and the lady who sold it to me badmouthed Chrysler products. A few years later I ran across her at a local Chrylser dealership and wouldn't you know it, she was badmouthing Fords and the rest. Said she'd never work for a company...