Not really sure how good the EF.3 would be compared to the GR.1 / GR.4 in game to be honest. As far as I can see the advantages would be fairly minor:
Two more sidewinders
A decent radar (but no radar missiles when ALARM is fitted)
A bit better flight performance.
By comparison the GR.1 / GR.4 would could carry over 4x as many ALARM missiles, and mix and match them with other ground attach ordnance in all sort sorts of combinations.
In fairness we only worked out it existed a while after the Tornado was added to the game, and we only found any details on it fairly recently. There is very little mention of it online or in books. The primary purpose of the radar was ground mapping.
Considering I got confirmation the Italian Typhoon DA.7 and trainer manuals were absolutely not okay. I seriously doubt this one is good to use, which is a shame as a modern IDS/GR manual would be really nice to have.