I honestly don't know too much about GNU cash; I just looked at it
this evening again (its been a few years since I last peeked at it).
I think GNU cash would server some users very well. I imagine those
users would be more of a 'power' user or someone not afraid of
accounting. With CashForward, the focus is more on household spending
and more on the average user. Thus, the terminology and user
experience will (eventually) be more, lets say, 'refined', than GNU
Cash. Nothing against GNU cash; CashForward is intended for a
different audience.
--Bill