Just from a quick glance the BUG seems to be faster over all and includes polished packaging. However, I don't like how the BUG dev kit looks to be very Java Eclipse centric. The Gumstix provides a complete buildroot build environment which is probably more conducive to serious low level hacking, if the bug provides this they don't make it obvious on their website.
The BUG is also twice as expensive at the Gumstix though it does have better specs.
Just from a quick glance the BUG seems to be faster over all and includes polished packaging. However, I don't like how the BUG dev kit looks to be very Java Eclipse centric. The Gumstix provides a complete buildroot build environment which is probably more conducive to serious low level hacking, if the bug provides this they don't make it obvious on their website.
The BUG is also twice as expensive at the Gumstix though it does have better specs.