With perfect play and the same index numbers, say ill 18, how many extra hands per hour would one need to play with hi lo to generate the same hourly ev as using wong halves?

(Right now, i can do hi lo in my sleep, just started using halves in DD and im a bit slower... might be same ev as hi lo with the speed differences)

Also, how much more fluctuation comes from using hi lo compared to halves?
(Sense hi lo over and under estimates player edge where halves is a lot more accurate)