Aperture or Lightroom?

I've downloaded the trial for both Aperture and Lightroom, but I'm stuck on which one to use and buy in full... they both seem comprehensive and workable but does anyone know which ones better? Help!!

This picture was taken using my new macro lens... very proud of it indeed! down the trumpet of a rather large flower in a rather large green house! I really like the colour and the DOF thought this was a good blip... so here I am, a day late as usual!

enjoy xx