in the end the only way to really say what you like more is to lvl both of them.
i'm a dragoon main since 5.0 and i still love the job a lot. but i have to say that little i've played with reaper also is fun. dragoon is straightforward but has a lot of ogcd's. movement is great with both jobs. never understood people talking about dragoon animation lock (yeah i know it was bad in the past).... its gotten a lot better with the enhanced double jump. and the also fastened jumps overall at some point. stardiver (is that the english name?) does have one but with that you have a small timewindow to work with.