Actually the roof is the same height but the A pillars are designed differently. When you put it all together and the wood is in you will find you have a 1"X1" square at the top of the pillar that the wood shows and the top or gutters won,t cover this area.
You need to look at a Tudor cowl to see what I mean, the difference will be obvious in comparison. I may be able to get some pics unless Brent has some he will share.