Closing Recommendation
Both are capable 76 HP class backhoe loaders, so pick by what you need most after the purchase. Choose the JCB 4DX when you dig deeper foundations, want higher lift and faster hydraulics for truck loading, need brakes and parts available in nearly every district, and want the easiest sale later. Choose the Bull SD76 BS5 Super Smart when you want GPS tracking included, brakes that need less attention, better fuel use to keep your monthly bill down, and a wider bucket rotation for careful placing of material. So match the machine to your work: JCB 4DX for depth, speed and easy service, Bull SD76 BS5 Super Smart for tracking and lower running cost.