Originally Posted by
RandomTroll
Is there a reason to buy a pull-up instead?
Why that's easy. Where are the cable stops on your bike?
If they direct your front shift cable under the bottom bracket, you need a down pull front derailleur. If they direct the shift cable downward from the top tube, you need a top pull front derailleur. There are of course work arounds that make it possible to change from one to another but, unless you're trying to solve another problem, why would anybody want to?