I believe the answer to this question lays entirely on the playing style of the drummer. I presently have an Iron Cobra Double, Axis
Longboard and DW9000. Although I on occasion, I my choose to utilize one or the other, most of my C&W or Blues set-ups favor the 9000, as double-beats or nuances come easier, for me. Sure I've replaced a couple of boards, but survived. On Rock sets usually take the Double IC. Although a really good pedal, my 2+-year old Axis
may last me till I die, as I've succumbed to carrying it, as just a back-up. I have an impressive pile of Speed-kings that need to-be melted down someday.