DDMとDDARは似た二階建て車体を持ち、混結されることもあります。違いはDDMが電車で、DDARは機関車に牽引される点だけです。DDMの電動車は、通常の車両の2台車とは異なり、3台車を持ちます。
DDM and DDAR have similar double-deck bodies and are sometimes mixed together. The only difference is that DDM is an EMU while DDAR is hauled by a locomotive. The motor car of DDM has three bogies, unlike normal cars with two.