kone pure is NOTHING like the g500, i recently got the Kone SE and while it has a thumb groove the right side is clearly designed with curved fingers in mind, it's also tiny wich is why allot of ppl like it for fingertip, just don't touch roccat mice unless you claw to an extent imo. If you look at pictures of it you will see it has very square edges which will dig into the hands of people trying to palm grip it like a g400s or g5/500/500s.
So for op, if you grip the mouse with 3 fingers on top i'd recommend looking for a g400s if you care most about shape, G500s is technically the last direct successor of the G5 shape but both of these don't compare well to mice with 3360's etc.
If you don't mind "heavy" mice ie. 125grams then the G502 is really nice, allot of people like the g403 and it's various iterations but to recommend that i'd need to know your grip style. imo g502 is a safe bet for a mouse with a 3360 and close shape.