I admit it I'm a little biased towards Lightroom since I've used Lightroom since it came out. But since in TWIP #5 Scott Bourne and Alex Linsey were so "ga-ga" over Aperture 2.0 I decided, "OK, I'll keep an open mind and check out the new Aperture 2.0 just released". I downloaded the 60 day trial and decided to give it a fair shake and see how it compared to Lightroom.
The previous versions of Aperture, I hear, were a bit slow and awkward. I can't confirm that since this is the first time I've used Aperture. However, I find the new Aperture 2.0 every bit as fast as Lightroom on my MacBook Pro laptop. The image adjustment and cataloging features seem very comparable to Lightroom. I could easily get used to Aperture if I used it just for cataloging and image adjustment.
Until I got use to using Lighroom's Web module I didn't consider slide show creation to be an essential feature of software like Lightroom and Aperture. But after using Lightroom and seeing how easy it is to create a online slide show to show a client a set of photos I've come to realize it is an essential feature for any professional photographer. Your client is always some place else and the Internet is the only reasonable way to quickly review a set of photos with a client. In real estate photography it's doubly important since you'd like to include a elegant slide show as part of your product for real estate people because they can use the slide show as a virtual tour, linking to the slide show from any number of real estate sites.
So I was naturally anxious to see what kind of slide shows one could create with Aperture 2.0. What a disappointment! You can't automatically create a slide show and put it on ANY site that has FTP access (virtually any web site on the planet) like Lightroom, but with Aperture 2.0 you can ONLY create slide shows on the Apple promoted .Mac site (which is in my opinion a complete toy). At first I was so stunned I was ready to remove Aperture from my laptop and throw in the towel. But since you can get a 60 day trial to .Mac I decide to take a look what kind of slide shows Aperture could create.
Well here they are. My slide show is at: http://gallery.mac.com/lohrman#100030&bgcolor=black&view=mosaic&sel=11 By the way you have absolutely no control of this ugly URL! What is more, anyone looking at this slide show can click on the "My Gallery" button (upper left) and see all the other slide shows I've ever created on .mac. Or if some one would like to they can click on "download" and get a ZIPed file of all the photos from any of the slide shows if they'd like to. When I read the Apple .mac terms of service it appears to me that if you used .mac slide shows as a part of your product you would violate the non-commercial clause of the .mac terms of service.
Conclusion: The Apple .mac site is a rudimentary photo sharing site that works fine for sharing photos of the kids or grand kids but it's not a place to put professional looking results you want to show clients. Apple .Mac is simply not a professional online venue. By integrating Aperture into Apple .Mac it has completely made one of the major essential features of Aperture useless. In my opinion Aperture 2.0 is not usable by professionals for this reason. Unless the professional is willing to for go professional looking slide shows.