the reach on an ashton is the same as a control( long 1085) so i guess the zenth will be shorter reach due to shorter wb and higher bb. however, the reason you wont be great at taping on the ashton will be the headangle. as its steeper that most uci bikes it is harder to tap. ali c can tap pretty well on it though now. maybe keep it and practice and alter your technique.or sell it and get the zenith and i reckon your taps will come back.