Roland RD-300NX vs Roland RD-700GX

Roland RD-300NXRoland RD-700GX
Key actionIvory Feel-G keyboard88 keys PHA II Ivory Feel Keyboard with Escapement
Polyphony128128
Sounds / presets939242
Sound engineSuperNATURAL Piano, SuperNATURAL (E.Piano), PCM Sound Generator, GM2 (for SMF playback)Conforms to General MIDI 2 System, 88-key Stereo Multi-sampled Piano Sound
SpeakersNone (line out only)None (line out only)
USB audio—No
Weight17.5 kg25 kg
Released20112008
Statusdiscontinuedlegacy
Keys8888

Which one should you buy?

Full spec sheets: Roland RD-300NX · Roland RD-700GX. Rows with a highlighted background differ.