Although Vista and Tiger are almost playing in the same field in terms of features and technology, there's a major difference in the strategy that the two companies made in delivering their next-generation operating systems. Microsoft wanted to bring everything new and shiny to the table all in one big package, while Apple slowly built and perfected a world-class operating system by frequent, less dramatic, major upgrades. This explains why while Windows XP stayed for 5 years without a major upgrade, OS X had 3 major upgrades to its original incarnation in roughly the same time frame.

User Interface

The most noticeable improvements happen here, and rightfully so, since improvements in the user interface are the ones that affect the users first and foremost. Vista seems to have taken many pages from the Tiger book of slick features but also has some features of its own that's missing from the Apple operating system. I think it's fair to say that some similarities are really just inevitable end results of improving the current state of the UI in both platforms.

Vista's icons are now as slick as its Tiger counterparts, supporting icon sizes of up to 256 by 256 pixels. Tiger on the other hand, currently supports only up to 128 by 128 pixel icons. But Vista takes it even further, using what is called as live icons. A live icon visually resembles the actual contents of the document it represent so that a folder's live icon is shown as a folder icon padded with the thumbnails of the actual files that you'll see inside the folder. This is very helpful in skimming through your files and folders without opening them. Tiger can only show previews of graphic files.

In Vista, the "My" way of naming user folders such as My Documents, My Music, etc. has been dropped. Now you will only have user folders named Documents, Music and Pictures. Not unlike what Tiger has.

Aero, the user interface of Vista brings to the Windows world lots of transparencies. Application windows in Vista show a translucent border that lets you see through it. This is a feature that OS X once had, but was taken out in Tiger.

Expose, which is perhaps the most innovative UI feature of Tiger, elegantly addressed the window-management problem most users had, especially those who work with lots of windows open. At the touch of a button or at a flick of the mouse, all your windows are miniaturized and smartly tiled across the screen. Vista offers its own take, with a feature called Flip 3D. In Vista's version, windows are miniaturized and stacked on top of each other, and angled such that you can see enough of each window's content distinctively, and you use the scroll wheel to go through all the stacked windows. Tiger's implementation is more usable and convenient than its Vista counterpart.

Widgets vs Gadgets

In Tiger, the days of opening full-blown applications for simple, specific tasks have long been gone. Thanks to Dashboard. With Dashboard, you can install and run mini-applications called widgets that are specially designed (using a relatively easy language) for certain tasks. Widgets include calculator, stocks, dictionary, yellow pages and many others. At the touch of a button, all these can auto-magically appear when you need them, and as quickly, disappear to let you go back to what you're doing.

Vista sports the same feature, only the mini-applications are called Gadgets, and the Vista version promises more integration with Microsoft's online service http://Live.com.