There is only your preference. Give either a try if you can.
Different plant - different spirit. Different alkaloid ratios, if you're more of a scientific rationalist type.
Also, people like to do Gibran's tek on Rue. There seem to be indications that things that are not the harmala alks are quite lovely medicinal substances - vasicine and the like.
Give it a shot, unless you're a pregnant woman.
Good luck.