Fused filament fabrication uses a continuous filament, while material jetting deposits droplets of liquid photopolymer. Fused filament is generally more cost-effective, while material jetting offers higher precision and surface finish.
As far as finished parts go, fused filament fabrication produces parts with a layered appearance, while material jetting creates smooth, uniform surfaces. Filament parts are generally more cost-effective while jetting offers higher precision and detail.