The part number for the OS Speed you saw in the French article is 11377, which is for the EFRA version.
The part number for the one offered in Tower is 11376, which is for the IFMAR / ROAR version.
In other words the difference is the crankshaft. EFRA limits to 7mm internal passage and no chamfer at the exit, plus the scoop can't be integrated to the passage. IFMAR crank is open to any mods.
Price is absolutely outrageous!!!