fluctuates
Assuming that you had 501 hrs on each, and were prepared to move around then this week I would say GLOBAL....next week who knows.
If you hade 0 hrs, then neither.....
If you had 1000+ then it is all about who you know.... but in general Global....ACASS are a good place to start.
But then I am always looking for my next gig, and thats Gulfstreams.
More interesting. well they cover the same routes, ranges, and destinations, in terms of fun to fly the I think the G550 wins.
glf