Kick and snare stick were much improved, but the hi-hats still have that almost 'brushed' quality I've always disliked. Not enough definition to me...
It sounds as if effects and EQ are almost the primary differences between the two, but the drum samples help.
How many new kits with new sounds did Yamaha give you?
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An arranger is just a tool. What matters is what you build with it..!