I've got the same 5 speed hub gear on both bikes, geared more or less the same. I just powered up a particular long hill in middle gear on the Dahon, something I've never done before (usually in gear 1 or 2, spinning away). I guess it's the training I've had from the Brompton and Curve; switching back to the Vitesse everything is that bit quicker and easier.

I think it's time for me to sell the Curve.