It's down to the product description of the Eurofighter on Gerstlauer's website. It does say that a Eurofighter has a 97 degree drop and kind of makes out that is the defining feature of a Eurofighter.
Though it does also claim that the drop is at the beginning, so any Eurofighter without the drop as the first element (so Saw
) isn't a Eurofighter - if you really want to argue semantic and we're not that petty, are we?
It's also due to the plans saying that The Smiler is the same coaster type as Saw, so that's a Eurofighter - but that depends on those plans being accurate (they were pretty close).
The problem is, the Gerstlauer Eurofighter "spec sheet" hasn't been updated since Rage was built so it doesn't encompass anything new and interesting they've done with the model since. The Smiler is also not yet on as part of their "projects" - so maybe The Smiler isn't Gerstlauer at all?
When it gets added, it will either be classed as a EuroFighter, or not. At the moment it's the closest product in their portfolio to match it to, so at the moment it is until Gerstlauer update their portfolio I guess?