NGA & NGB are the 2.0l engine codes for the Mondeo...
The Focus 2.0l engine codes are EDDA, EDDB, EDDF, EDDG...
If you discount the ancillaries, exhaust & TB, the only significant difference, is the 'coolant' sensor. The Focus uses a CHT and nothing in the thermostat housing; the Mondeo has a sensor(s) in the thermo housing. The Mondeo head has the tapped hole for the CHT, its just not used.