Anyone have a comment on the Wadia 270se Upgrade?

I have sent my Wadia 27 in for the ix V.3 upgrade and purchased a little used 270. I am considering sending the 270 in for the "se" upgrade. Has anyone else done this or heard the difference? I run the 27 directly into ARC CL 150 monos (balanced) to Thiel CS 5i.

Cary