one should always remember, the "new" Su27 or F15 models are refinements of the existing models which were made by ED, countless hours or work had been done by ED before these "new" model could be released. while the Typhoon model is a built-from-scratch.
what's more, the Typhoon has different wing arrangements than most other fighters(su27 or F15). in the game Lockon, this type of fighter is not specificly modeled. hence the 3D animation is more difficult.