Hi Lee, I'll try to explain a little better what I meant...

The Tyros2 is "sweeter" sounding (more detailed) than the Tyros3...my opinion, but supported by others.

The Tyros3, on the other hand, has a more robust and heavier sound than the Tyros2 - some complained the T2 was not beefy enough (too CD like), and so the T3 was meant to add some density to the overall sound.

Then, some T3 owners missed the characteristics of the Tyros2, which were admittedly, a little difficult to dial in with EQ and Compressor, although most were able to get something they were happy with.

They (T2 and T3 owners) both wanted "Live" sounding drums.

The Tyros4 has the sweetness (detail) of the Tyros2, and also, it has the robustness of the Tyros3...in other words, it is the best of both worlds...and it has some extra "live" sounding drum kits.

I admit I am biased towards Yamaha (that's why I work for them...I like the sound and the product) but this Tyros4 is very impressive...if you are a Yamaha fan or appreciate Yamaha's OS and sound/styles/features, then you will probably love the Tyros4.

Sound is subjective and personal, as we both know...I wasn't ecstatic about the T3's sound, which is why I played the less robust but "sweeter" PSR-S910 most of the time, but the fellow who bought my old Tyros3 was thrilled at the sound and didn't want it changed in any way.

I hope this makes things more clear.

Ian