If you're currently a G550 Captain, why don't you have better info than the riff raff on PPRUNE?
FSI is miles ahead of ECFT... CAE does NOT have a 550 systems manual. Yup, you get given a GV manual, and then they say "Please don't read this"...
Go to Savannah! It's where they build them.
Last time I was in a Muslim country, I told a maintenance guy "If you're Muslim, pray to Mecca, If you're a business jet pilot, pray to Savannah.
If you're paying for it, and also looking for a full time position, please do not do GV and differences. With many 550 operators your resume won't get past initial review
my 02