still highly depends what services you load... for eg, you might not need activesync, Bluetooth drivers on either, and one might load faster depending on what you take out and how the OS is developed...
I still prefer to look towards an open source / linux-based version... Freescale has android BSPs.... I have access to WinCE 6.0 and 7 via Dreamspark for free, but i'm only supposed to do personal/academic stuff on it, which means anything I work on can;t be released to the public
I wish I had more time to semester to play with this device, but I think my time will be better spent trying to "root" WinCE 6.0, and possibly load linux/android on to it
I'll try to contribute during spring break in 2 weeks