It's not the same motor in both hulls. It's just the same kv, nothing about those motors are the same. That's like saying all v-8s are the same regardless of brand. I acutally like the AQ 1800 motor slightly more then the PB 1800, The AQ seems to have a tad more torque. Both are good choices, if you are newbie however the mono maybe be the better choice as they are easier to setup and drive then a cat is. You will be happy with either one, both companies are awesome and both have excellent warrenties. I like the throttle response of the Aquacraft esc's also, the PB esc's low end throttle sensitivity is not that good. JMHO