I'd take the PSR-1000. Here's why,

-way better screen
-style recording, and editing
-16 track sequencer with editing
-basic voice editing
-way more indepth DSP editing
-better speakers
-better sound (in some areas)

The only thing is it's 61 keys. However I think it's more for your money if it's the same price.

Squeak
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GEAR: Yamaha MOXF-6, Casio MZX-500, Roland Juno-Di, M-Audio Venom, Roland RS-70, Yamaha PSR S700, M-Audio Axiom Pro-61 (Midi Controller). SOFTWARE: Mixcraft-7, PowerTracks Pro Audio 2013, Beat Thang Virtual, Dimension Le.