Absolutely, there is no "better", just differences which suit differing individual preferences. Trying before buying is the only sensible way to choose.
Thanks to all for contributing.
BTW, just ignore paulmj21...he's from Glasgow...hope that explains his comment ;-)
flecc, this is the real difficulty, actually getting to try bikes.
I am fortunate enough to have a Wisper dealer in the area and I have to say I'd have no difficulty buying a Wisper on a number of counts. The quality is great and the commitment to customer satisfaction and support is excellent. It's just the fact that Kalkhoff or any other crank powered bike manufacturers/sellers do not have any outlets in Scotland, as far as I'm aware. To try a Kalkhoff or alternative crank powered bike would mean a round trip of hundreds of miles, and as I am trying to 'save the planet' would seem a bit counter-productive ;-)
I know that some dealers will send a bike on approval, that's great, but it would cost about £60 in curler charges to send back if it was not suitable.
What this customer needs is access to bikes, where EBikes are in the business cycle, (no pun intended) is probably early developing with fairly low distribution, the pace of development of eBike business networks seems to be powering on at a snails pace...with a heavy lead acid battery attached...and no throttle! ;-)