Three difference is that you can replace the system library with a recompile. (And sometimes without.) This is exactly why FSF had to put in the exception to ge

Three difference is that you can replace the system library with a recompile. (And sometimes without.) This is exactly why FSF had to put in the exception to get people to even use their implementations. Despite that, BSD and Android did not. They are even avoiding GCC now... You absolutely cannot do that with firmware without detailed device specification and potentially signing keys. More so if certification like FCC is involved.