Steve [sledger] is on record as being an an opera fan - I am a firefox fan.

Whilst there are technical reasons for opting one way or the other, personally my preference is due to a combination of interface/familiarity/available customisations [add-ons]. I know the fox very well indeed.

I wouldn't think you could define one as better than the other in absolute terms - end of the day it matters more how you the user approach things