I've been saying it since he was drafted, but Turbin has the makings of a third down running back. For some reason, probably his biceps, people think he's a pure north/south bruiser. He doesn't have enough bulk in his lower body to be a fullback, IMO.
Turbin is a good receiver with good speed as a receiver. Michael is a pure running back, much less versatile.
Turbin replaces Washington as versatile running back. Michael is goal line specialist early on, and an eventual replacement for Marshawn.
“We need to be challenged, ... and we need to be under the gun to respond.” --Pete Carroll