The Outback is wider so the most stable and has large side trays for rigging fishing stuff. But the width is a problem for getting in/out especially on the water and will make it a little slower. For launching in the surf the wider body makes it a bigger target for the surf to pound it into the sand.
I would say if you are going to fish mostly then get the Outback if not get the Adventure. Itâ€™s better at all the items the Outback is a little weak at. Not to mention faster, easier to launch, easy to snorkel from, better in rough seas, 8 miles no problem, and itâ€™s the one I purchased.