I know that there are a ton of Aperture and Lightroom threads out there, but mine is slightly different, I am looking to find out if Aperture uses significantly more resources then Lightroom. I know that the best thing to do is to try both myself. However, that really won't work well for me since I'm new to photo editing, but I want to get more into it, so I won't be able to put the programs through its paces. I just want to pick one app and just learn it from the ground up and since I don't have any prior experience, I won't bring any personal biases into either program. The key differentiating feature for me is going to the speed of the program. I have a MacBook Pro 2.16Ghz with 2GB of RAM. I'm not looking into upgrading further because the prices on laptop 2GB RAM is pretty outrageous. I know that LR uses fewer resources the Aperture, but will the difference in performance be significantly noticeable on my system?