My wife has the HL, I've the Winterlite (not among your list I know). I've had an internal baffle fail on my first mat which was replaced when I got back from Iceland. It was a little interesting sleeping though
Fortunately the baffle that failed was one of the side ones rather than the middle.
What I think are the causes are that A) the mat is inflated as much as possible & B) there's sudden and/or large pressure put on the mat, i.e. dropping onto it. This puts too much strain on the RF welds used so you get (and hear) a sort of unzipping/tearing sound as the weld undoes. The solution seems to be to inflate fully then let a bit of air out - a second or so of release will be enough. This lets the remaining air in the mat move around when you sit or kneel on it so that you don't get a potentially failure inducing excess of pressure.
There's not a huge difference in packed volume between the Hyperlite and the Winterlite, probably a Cm or slightly more in diameter, the HL is about the size of a 750ml water bottle. Of the two models you show, I'd go with the Hyperlite, for 60g and a small volume increase it will do you year round. If you *need* a pillow to sleep then note that you will be several Cm further off the ground so will need a bigger pillow.
