Closing Recommendation
Both are capable wheel loaders, so pick by your site shape and how far you carry. Choose the Liebherr L550 when you load trucks at an open quarry face, when a higher payload and bigger standard bucket fill trucks in fewer passes, and when a stronger engine and stable build suit heavy continuous loading. Choose the Volvo L90H when you work in a packed yard or plant where a tighter turning circle saves time on every cycle, when higher travel speed shortens a long carry, when a wide bucket range lets one machine handle light and heavy material, and when lower fuel use protects your margin. So match the machine to your work: Liebherr L550 for big loads at an open face, Volvo L90H for tight yards, long carries and low fuel cost.