Aplix was originally made by the Velcro company. Velcro needed something that help up to a lot of use vs. he simple opening and closing of a wallet or somethng of that sort. So they made the aplix with a tighter loop so it help up to more frequent use.
Aplix got bigger and went off on their own (not sure why) and now there are the 2 seperate companies.
But as far as the difference the main difference is in the looping of the loop part, the aplix is tighter. They last longer for our purpose.