You're right, I was tricked believing they are the same and lucky not to brick it.
I might actually keep it and try to add it, I work with Linux a lot so it should be possible. But I need to make sure the HW is supported first.
I found this article where you say it isn't?:
Is this HW the same case as it also has 1GHz MIPS24Kc which seem to be Realtek?