Paper tape and fibreglass mesh tape are two types of joint drywall tapes used in construction. The main difference between them is the material they are made of. Paper tape is made of paper and has a crease down the middle, which allows it to fold and fit into corners easily. It is generally used for inside corners and is applied with a joint compound. Fibreglass mesh tape, on the other hand, is made of woven fibreglass material and does not have a crease down the middle. It is generally used for taping drywall joints and has a self-adhesive backing, which makes it easier to apply than paper tape.