Both of them are great in their respective spheres.

Trying to compare them is like comparing Pink Floyd to Enigma. Both are brilliant at what they do but completely different.

btw I find it quite ironic how many people here are saying the BeeGees are nothing but a cheesy disco act while we're discussing how annoying it is that people think Bruce is a red neck Nugent wannabe when all they've heard is Born in the USA and Dancing in the Dark...