I know you don,t like books but in the old Larry Atherton book they talked about the w2 versus the Cleveland with it big ports and good reputation. The Mullen prepped w2 did not quite outflow the Cleveland, but they claimed that the w2,s dynamic on track performance out did the Cleveland because of the better short turn
Of the w2. That book also emphasized that flow numbers are not everything and that the w2 design was very well track tested to perform all around, but now the Cleveland was not your run of the mill head either.