Well maybe i am wrong and so are the others that differ between Vfe and Vfo.
But do you not differ between a Vlo and a Vle?
Beechcraft manual specificaly says Vfe is an EXTENDED speed limit
Disregarding any manual, and just thinkingn about it with some commonsense, possibly some aircrafts design are so the flaps are not as strong in the transition as they are in their extended positions, these are the ones that have a Vfo stated?