Will a Windows LUN de-dupe against a VMWare datastore with an identical VM?

Hi, 

I am planning to migrate a 60TB physical Windows file server onto a new VMWare VM using Windows Storage Migration Service. Both of these would be hosted on the same Unity 880F, which has about 40TB free before I got to 90% capacity, which I don't really want to breach

Will the new VM take up another 60TB during the migration process or should that VM datastore be able to de-dupe against the original Windows LUN? (ignoring data reduction within the server itself for now)

Any Help Appreciated.

Mick