Originally Posted by Campag4life

Yup...the basis for my assertion. From a percentage standpoint...bearings outboard a 68mm shell versus inboard...it ain't small change.
The torque moment percentage wise is likely on the order of 10-20% more torque on inside of shell BB30/PF30 bearings for same pedal force because spacing is quite a bit less. Although unsubstantiated, this may contribute to reduced bearing life as well...which is often reported versus outboard bearings which in my experience have good durability life.