Reply to S4 buttons

I'm believeing about ordering an S4, but I'm curious about the buttons. Can't seem to find any reviews that cover this, so I ask you, oh DJTT gurus, are the buttons on the S4 the same as on the X1? Same rubber with the click? Or are they just squishy rubber like the launchpad? I don't have one to play with before I buy, and you can't tell by pictures.

Thanks guys.