Closing Recommendation
Both machines come from the Bull lineup, so the real question is which scale of work you need covered. The Bull Grandia offers a bigger engine, higher torque, an automatic transmission mode, and a higher lift capacity, but it runs at a slightly lower top speed, weighs more, and has a smaller standard bucket than the HD76. The Bull HD76 2WD is lighter, moves a bit faster, and offers standard GPS at what is likely a lower running cost, but it has less engine torque and a smaller shovel capacity. So match the machine to your work: Bull Grandia for heavier lifting and demanding excavation jobs, Bull HD76 2WD for lighter, cost-conscious operations needing steady daily output.