Interesting Charlie. Obviously, the big difference for our purposes is the involvement of the knee flexor (hamstring & gastroc) in the conventional style; that old posterior chain. Odd that nothing about the hip/back extensors is mentioned.
IMO, Crossfitters should use the conventional deadlift as the default deadlift. The idea is to engage the posterior chain. The fact that more mechanical work and energy expenditure are required is a bonus for us. A powerlifter in competition cares only about how much they can lift. For many that translates to the Sumo style due in part to the aforementioned factors.