FSC - US variant, includes
NO 12 volt outlet and includes a different fuel management system.
FJS - Japan/Europe including I hate to say the UK!!!! Includes a 12 volt outlet and fuel system in line with european/Japanese regulations.
(Not right hand drive as one of my well informed work colleagues inferred!!!)
Other than that not a great deal of difference. I use an FSC workshop manual sourced from the US.