Hello there,
I could not find a similar post so I decided to write what I've noticed.
On my main account I have Collector's Edition of MoP.
I moved one of my characters to other battle.net account where I have only normal MoP version.
After transfer I noticed that I have FoS achivs from Collector's Edition on normal MoP account
Nothing big but still... :-)
Is it a bug? or it should be like that? What do you think?
So propably it will work with other Collector's Editions like WotLK etc.