Both sound really good but for an arranger KB, the styles are much more important than the RH sounds. I'd like to hear more style comparisons.
I've posted many videos of the Korg Pa4X showing different styles. As far as the Tyros 5, since it came out earlier, there are many videos already out there, and just this week, Donny posted some.
Sometimes, I open two (internet) windows and go back and forth between the demos, because there are fewer videos comparing two keyboards together than there are videos demoing just one.
Also, I sometimes search for a certain song or style of two different keyboards on YouTube, and simply compare the two.