Sorry to hear that Donny.
AS Don said they are in 2 different leagues.
The PSR S-670 has a lot less voices and features:

http://faq.yamaha.com/us/en/article/musi...-76/10749/8710/

My feeling is that you might be happier starting from scratch ...
Good luck
Eric
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Genos, PSR-S970, TC Helicon VoiceLive3, Mackie 802-VLZ3 Mixer, 2 Bose L1 Pro16, Electro-Voice ZXA1 Subwoofer