Personally, I find the decision easy, I use both (or more types as the case might might require). For everyday wear in a canoe, especially here in Florida, I wear a self inflating suspender type. It actually would exceed the Type I standards execpt that it is an inflatable. If the weather is rough or I am crossing big water, particularly if there are power boats around, I put on a vest designed for canoe or kayak (easy to paddle in - don't try it in a type I). The self inflating is the one I would pick for MY canoe use if I could only have one.

If I am in an enclosed space (aircraft, closed small boat, etc.) I use a manual inflateable. I have one for most things (a suspender type) and one for flying over water (a vest type with pockets for my critical survival supplies).

I also have and use a Mustang Float Coat with the diaper for cold water (which I sometimes canoe in during cold, wet weather), and a flotation suit for work on deck in cold climates.

Respectfully,

Jerry