Closing Recommendation
Both are large machines for heavy work, so pick by your pit floor and how you price your jobs. Choose the Volvo EC750D when your face is firm and trucks load at one point, when a bigger bucket and higher digging force lift your tonnes per hour, and when the material is hard enough to need that extra force. Choose the Tata Hitachi ZAXIS 650H when your floor is soft or wet and lighter ground pressure keeps the machine working, when a smaller tail swing lets you work close to a highwall, when a published fuel figure helps you price a tender, and when wide Indian service reach keeps downtime short. So match the machine to your work: Volvo EC750D for big firm faces, ZAXIS 650H for soft floors, tight benches and easy costing.