Closing Recommendation
These two are the same base machine with different strengths, so pick by how hard your ground is. Choose the Liugong 939E HD when you dig rock, hard overburden or unblasted faces every day, when you need much higher digging force and a tougher hydraulic system, and when the machine will stay on one long project. Choose the Liugong 939E when you move soil, sand and mixed material, when you want a wider bucket range for varied jobs, when the site is soft and a lighter machine does less damage, and when you shift the machine between sites often. So match the machine to your work: 939E HD for rock and hard digging, 939E for mixed material and easier moving.