The UI on both are very similar.. I used aperture for about 3 months, because I'm an apple fanboy.. I found it a little difficult to learn.. So I tried LR1 (this was 2 years ago now) and was happy that it looked the same.. Then found it a LOT easier to use than aperture..
I think it's smart to get the trial of each, and try them side by side.. And make the decision yourself... I haven't regretted the switch to LR and I use LR3 on a daily basis as a professional photographer.
I also found a lot more ppl out there making filters and such for LR so that is really handy! (check out lightroomkillertips.com)
Location: Aylmer (Gatineau) across the river from Ottawa
Lightroom 3 all the way for me. Very powerful and intuitive to use, plus if you have Photoshop the integration is great. I also believe it is less intensive on system resources, but I could be proven wrong on that point... just something I seem to remember having read somewhere.
Hmmm.......I have both Aperture and Lightroom but haven't installed either for i have been putting it off until i decided which one i thought might be easier......but i like what i hear about not really needing PS once you got more familiar with LR......
Sounds as if Lightroom just won
13" Mac Book Pro
2.53 GHz, Intel Core Duo 4 Gig Ram- Sept 2009