The distinction between glue and paste is not well defined. For papercraft workers slip is an important feature, for which paste has the better reputation. It is all an area where we cannot give much advice - you have to learn by experience, and we hope that none of our products will let you down.
One of the easiest ways of ruining a glue, or paste, job is to move it before the glue has set. To have a peep, or wiggle, can ruin your handiwork, and spoil the reputation for an otherwise good glue.