Those two instruments are SO different.
The tone of the drums, the size of the keys, the mic processor, the storage mediums, the complexity of the rhythm styles and fills .......
These 2 are like night and day, and it's not likely that both will suit the same player. Better play them alot before you decide. They have so many different quirks about them.

Hands down, the Tyros has the best aftermarket support.
The 7000 has the best sound system going
The Tyros is light
The kn is heavier
Both have color screens
The Tyros handles midi playback better ( selection and execution)
The kn plays audio files(MP3)

So, you see ...... it's apples and oranges, my sunny friend !