I just got hold of these two devices. A BlackBerry Bold 9700 running OS 5 and a BlackBerry Torch running OS 6. Apparently both devices do not have a difference in processing power but the operating system boot up time looks drastically improved for OS version 6.
One of the thing that has always been irritating me has been the time a BlackBerry takes to boot. Any other phone does not take that long but things are eventually changing and the new OS has done some work to improve the boot up speed.
Checkout the video.