Rolandfan,

The sweet sop voice sounds the same to me, as the one that's in the T2 and the one that was in the PSR3000.

How does what compare to the E09? The sop. sax or the entire keyboard? Roland's sop. sax don't hold a candle to the Yammy's sweet sax.

However, the E09 in general is a much more serious keyboard. Many of the best Roland voices live in the E09, including a fabulous stereo piano and beautiful stereo strings. It has a number of features not in the E403: 64 poly...multi-effects...16 track sequencer...L/R outs...MIDI in/out ports...more powerful speaker system to name a few. On the other hand, it costs almost 3x as much, too.
Lacking on the E09 is USB, arpeggiator, and the ability to import files (styles and songs).

That is my comparison from what I could gather and comprehend from internet info. Your experience may differ.

Tim