In my personal opinion, both FMS systems do a good job. The Boeing system on later models (e.g. 777) is more capable than the one on the Airbus (A320 family) but is less intuitive in use; more ways to skin the cat and hence more ways to fall into a trap or two.
(edited due to another's previous post being removed!)
Last edited by Spearing Britney; 22nd Apr 2005 at 12:25.