Mike, I've used both, but like yourself I prefer Saddles.
When using cape hackle it is only because I want a colour that I don't presently have in a saddle hackle. I select the narrow longest feather that fit the size I need best.
I tie them in by the But, the same way I tie in the saddle hackle.
This one was tied using hackle from a grizzly cape. -Yaf
A warm summers rain falls down on a quiet fishing stream
Lined with cabins, smoke straight to the sky
Two ol fishin buddies with never a care
Teasing a trout with a fly.
(Simani, "This Isle of Mine")