All the markers these days have uncapped (or equivelant, faster than you can shoot anyway) boards and anti chop, so if there's a ball in the breach, they'll fire as fast as you can pull the trigger, so you're basically down to how fast the marker is physically capable of cycling, which in any case is faster than you can fire it. So no one marker really has more "raw firepower" than another. Timmy's aren't faster than Angels (or Vikings, or Bushy's, or...), no matter how Bob Long and the PBnation kids wish they were, so go with the marker that's built with the best quality, and that feels right. If it were me, I'd pick the Fly, because WDP builds higher quality stuff than Bob Long (personally, drilled air passages, built-in LPR, milled out solenoid housing, etc, seem a little more sturdy than a solenoid tacked onto the bottom of a Spyder body with hoses and barbs carrying air to the noid from the reg stuck onto the front). Just my personal opinion.