Zalt, no the donkeys are the same as the AW139 (P&WC PT6s) and they have the same -67E number.
The only difference there may be a full time DEC rather than the AW139 EEC.
So I am figuring roughly the same specific fuel burn; they also carry up to 530 gallons fuel.
This EC-175 got nothing to do with the S-92, but everything to do with ch....., I mean inexpensive production costs.