Yes, the Unity Diff site license (100 installations) is UNY SDU ZFF CD21.
The Single seat license number is UNY SDU ZFU CD21.
Unity Diff Version 2.1 is compatible with Unity v4.0 and V4.1 S, M, L, XL , XLS
Legacy KB System (APS) Data: RESL201898 V1.0, Originally authored by DaSo on 04/19/2010, Last Edited by DaSo on 04/19/2010
Related ranges: Unity Pro