just to make sure, when you say "fits good on both", have someone looked at your bike position, made sure that the width of the handlebar, length of the bike (top tube+stem) and the height is correct for your measurements? this is more important on a road bike than on a MTB, and it's best to get these right from the beginning.
a good place to get some default values for bike fit is Wrench Science
(click on road
and then on fit system
, apparently you need to create a user name, but after that you input your measurements and you get some values to start with)