What would be the capacity trade off between the two attractions?
Well, T2's capacity is 700 per show... And the number of shows a day depends on the time of year... As far as the walkthrough, I haven't seen any figures on capacity for Hollywood, and have never been able to find the capacity for House Of Horrors (though anytime I ever did HoH it was walk on). I would assume the capacity is similar or slightly less then a typical HHN maze.