The cam teeth are different on the EVO from the 800.
Your ECU options are:
EVO ECU (Siemens?) - Wiring involved to adapt to S2R chassis
800 ECU - Magneti Marelli with custom map (stopintime linked it)
Standalone with Ducati wiring (e.g. Nemesis)
Standalone with custom wiring (e.g. Microsquirt)
It all depends on your wallet size and skill set or willingness to dive into the deep end.