i'm sure this has been asked before but i couldn't find it in the first few pages of the messege board. what does the 0.2 ghz difference mean to a consumer who is only looking to use the mba for internet, documents, store a lot of photos in iphoto, and occasional uses in idvd? I'm guessing that there's really not much diffence, but i just wanted to check with the experts in here if it was worth spending the extra $300. thanks a lot!
While there will be a performance difference, its not going to have a big hit for the "average consumer". iDVD will probably be where you see the most difference, but even then the bottleneck may be the hard disk rather than the processor. We need more data on MBA drive performance that just is not available at the moment. Running off into the realms of speculation though...
The 1.8 inch drive in the 1.6 may give disappointing performance - especially with iDVD or a very large photo collection.
On the other hand, the SSD will give much better over all performance (but at a price), but its write performance many not be any better then the 1.8 inch disk - which will again be a potential issue with iDVD. And it has a lower capacity.
In either case, when working with iDVD it may be an idea to use a nice big external USB drive.
SSDs are the future - especially for notebook. But they only now are getting to the almost affordable point. By the end of the year I fully expect to see the MBA to be SSD across the range. This 1.8 inch drive is just a stopgap until the prices come down (and capacity goes up).