I have the contour, the rifle, and the shotgun...never used the jungle one, but it looks like the cat's meow. I love the ones I have, but can't offer much more than that except that the contour model is a bit easier than the rifle model to wrap your arm through to help steady those off-hand shots. The rifle version is nice for the heavier guns with a big scope and bi-pod. Also, the "hush stalker" swivels can get squeaky, but a little bit of bow string wax takes care of that no problem.