Don't know about that, I can imagine quite a few things the Tyros 4 doesn't have that I and millions of other people use every day around the world.

The Tyros doesn't even have a proper Sequencer, let alone a sampler, full midi implementation, or even a sound engine that can access all it's own functions.

I'm almost tempted to start throwing around the terms Home Arranger VS Pro Arranger and comparing.