Closing Recommendation
Both are serious mining machines, so pick by how your pit runs. Choose the Liebherr R 9150 G7 when the face is fixed and trucks come to one loading point, when a much larger bucket lifts your tonnes per hour, and when a bigger fuel tank keeps the machine working through long shifts. Choose the Tata Hitachi EX 1200V when the machine must move between faces and benches, when faster travel and better climbing keep it productive, when a softer or wetter floor needs lighter ground pressure, and when wide service and parts reach in India keeps downtime short. So match the machine to your work: Liebherr R 9150 G7 for big fixed-face loading, Tata Hitachi EX 1200V for moving pits and easier support.