The road morph is a little easier to pump than the mtn morph. A few less busted knuckles too. It takes longer due to smaller volume per stroke, but it is easier.

BTW - they're both 35cm (348mm) long in closed position, despite Topeak's published specs. May be important if you're trying to fit in a tight spot, like behind seat tube.

All the morph pumps are easier to use than a std frame pump due to one end being anchored to the ground by your foot. Use a Zefal hpX, etc, only if you need to develop your upper body strength.

Park makes an nice adjustable frame pump that fits ~90% of the frame sizes, carried in the traditional under TT position.