Some other 9000 Pro features not found on the Tyros:

1. The 9000 Pro is a sampler. Samples can load automatically with midi files.
2. Four assignable outputs on the Pro in addition to the stereo outs vs. two on the Tyros.
3. The 9000 Pro has two plugs for gooseneck Littlelites - a wonderful feature that truly illuminates the entire keyboard and the music rack. The music rack is low enough on the 9000 Pro that I can use it without blocking me from being seen by the audience, unlike the Tyros.
4. XLR lo-impedence mic input vs. the high impedence mic input of the Tyros. All pro mics are low impedence so you have to use an adapter on the Tyros.

A word on the expansion cards the 9000 Pro uses: I own four, the PF, AN, DX, and VL. I love the PF piano expansion the most because I rely on the piano heavily, it's warm and the PF card adds 64-note polyphony to the 9000 Pro. I also use the DX expansion a lot with it's 16 notes of polyphony. The AN analog synth card is ok but I don't need analog synths very often and it only has five notes of polyphony. The VL is my least favorite because it is monophonic and more suited to people who use wind controllers. I didn't find the sounds of the VL to be significantly better than those already found on the 9000 Pro. Since I normally keep the PF and DX card installed in my 9000 Pro, the polyphony is 128+64+16=208.

To answer the original question - I don't think it's even close: the 9000 Pro is the better value.