Both glues are excellent for Hypalon. Stabond will work well for hypalon to hypalon, as long as its done right. Stabond may not expand and contract at the same rate as hypalon, but stabond will stretch several hundred percent before it breaks so it would be news to me if stabond patches that were well set fail. I have stabond patches that have been on my hypalon boat for a decade or more after many many inflates,deflates, sun, snow, blah,blah, and have no sign of failure.
When I started the business I did a bunch of testing. Assuming there isnt extreme heat involved, both Clifton and stabond will delaminate the fabric before they fail if done right. Even Shore will make an excellent bond when properly applied. The key to any of the glues is proper prep and application. If the glue is spread to thick (especially shore), to thin, the material isnt buffed or cleaned well, failure is likely.
If you want to carry a glue that will work excellent for any material on the river you cant go wrong with stabond. Its all I carry on the water and what I use in the shop more than anything else. Since stabond sticks to the material and then to itself to make the bond you can fix anything with any material available when needed. Run out of hypalon and have to use your buddys PVC to patch a huge gash, stabond.