Exactly, Expert Mouse = ring, Slimblade = the ball itself.
In Slimblade you can scroll from your neutral hand position, that's what sells it to me.
I've owned a Slimblade for 10 years, have tried all sorts of trackballs, and I can't imagine anything better for daily use.
I got the KEM for work, but requiring hand adjustment to scroll feels like a definite step back, so I sent it back and ordered a second Slimblade instead.
In Slimblade you can scroll from your neutral hand position, that's what sells it to me.
I've owned a Slimblade for 10 years, have tried all sorts of trackballs, and I can't imagine anything better for daily use.
I got the KEM for work, but requiring hand adjustment to scroll feels like a definite step back, so I sent it back and ordered a second Slimblade instead.