The study was never published by Jane’s, it is a limited study (those words are present in the original document) commissioned by SAAB for SAAB.
Jane’s people arent clowns, so the values they give are more or less exact (depending on estimations) using the criteria they chose. Everything is in the choice of criteria. So it is a valuable study, but limited to some extent.
Oh btw a study is done at a precise moment, as logistics etc. evolve during a program.

Length of the process is the very reason for Dassult proposed to deliver first 18 Rafales on a separate contract.

Half troll question (so dont take it seriously please) : Why US need so huge aircrafts with so little load?

LOL The Rafale is much more capable than the Typhoon in that regard. Nonetheless, even the Rafale doesn’t match the F-35. Especially, with the computing power or the comprehensive fusion of all of the sensor in one combined picture under all flight conditions.

Any clue about that?

Well, Situational Awareness is one of the most important factors in Aerial Combat. Yet, to answer your question I think it’s come to the forefront now. Because no platform as ever come close to merging several sensors together in one comprehensive picture like the F-35. Which, will give it true “Situational Awareness” for the first time in Modern Warfare. (or as Lockheed Martin says ‘Sensor Fusion”)

Although i agree on situational awareness importance AND on F35 excellent capabilities in that domain, you have simply no clue about other platforms… And sensor fusion is far from being a Lockheed wording…

He only says as far as i understand as a non native english speaker that the helmet is able to project HUD image…

GaN isnt a french idea, but first flying GaN antennas (spectra prototype) on a fighter (2014) are.
Its not only the antenna, its also very similar concepts apart from size between the two planes.