Benchmarks done by Macworld show the speedmark 5 of the 2.0 glassbook is 195 compared to 190 for the 2.4 whitebook.
The glassbook is speculated to have more of an advantage with its more capable graphics system when snow leopard comes out in '09. Snow Leopard 10.6 is expected to take full advantage of the new GPU.
http://www.macworld.com/article/136236/2008/10/aluminummacbook.html
I've wondered this too. My friend has a 2.4 whitebook and I've got a new 2.0 aluminum. I'll put them together and run some "real-world" tests and let you know the results.![]()