Piano Fantasia vs. Kasso

Curious:

Is PIANO FANTASIA the same person as KASSO or was that a complete remake?

Which version of "Walkman" was first?

1) https://www.youtube.com/watch?v=Rk0NKPVH33A

2) https://www.youtube.com/watch?v=Hh2DcX2xCko