With the advent of the zone read, I'm not sure coaches look at it that way. I think they look at both DE positions as guys who have to be extremely athletic to be able to run with the QB to the edge - first and foremost. Not sure we have anyone on the roster than can run like that. Gillam can run with the other's teams speed guys, and that's about it from our front 6 (i.e. 4-2 front).
Great post. You need DEs that can really run in today's PAC-12. If you want to understand how Stanford has had such a good run, look at their TEs and DEs they recruit. Extremely athletic and all are playmakers.