Over-locknut dimension (hub distance) (cup depth) changed after 10.000km
So it is not a diameter, it is distance! 135 mm is a classic value for rear MTB wheels with 8-11 speed cassettes. 128 mm sounds more like a hub with freewheel would have however. 

O.L.D. is a parameter for the axle (over the locknuts distance), not the hub shell width you show on the pictures. Having more washers or thicker cone washers on the old hub might explain the difference you see.