Are Galaxidion or La Spirale any decent?

I've heard they're on the Japanese editions of Cobra and Margerine.
Do you think it is worth paying mucho money just for those two songs?
The bonus tracks on the edition of Chemical Chords I got are even some of the best tracks on the album.
Can we talk about the same level of awesomeness in this case?
Of course, purely subjective, but...