Well, as far as I understand, the feather needs much shallower angle. Straights are sharp, but I don't think they are feather sharp. I'd ask the people who've used both specifically what's the main thing that should be done different. I think there were several of them who posted in your threads.
In any case, i'm sure sooner or later you'll try straights. Just as I'm bound to try feathers at some points, as well as the japanese razors... it just never ends