Loaded question !
The PA80 has more "in depth" features, but it is definatly harder to master. Here are a few differences:
SOUND - both great
SPEAKERS - Korg is better (740 is weak)
MIC INPUT - Korg is better sound, 740 better presets (korg has NONE)
HARD DRIVE - Korg wins - 740 doesn't have one
EASE - 740 wins big time - more logical, and easy to navigate
PRICE - the 740 is only $600 these days, quite a bargain. Yamaha wins this one
SMF/SEQ - Korg wins BIG here. TWO sequencers
You'll have to weigh out what's important to you. A better buy all around is the Yamaha PSR2000 for about $1100-1200 street price.
Improved:
Speakers, vocals & Harmonies, navigation, sounds - it's a tremendous value for the money, and still looks and sounds great. Very small and lightweight too. Better give a listen before you pick one! YOu're missing the "hot hand" if you don't try one.
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