A Side Gathering Collator is a type of machine used in the printing industry to gather and collate sheets of paper into booklets, brochures, or other multi-page printed materials. It works by using a series of belts and rollers to gather and align individual sheets of paper, and then fold them into the desired format.

An Inline Stitching Machine, on the other hand, is used to stitch or bind together multiple sheets of paper or other materials into a single booklet or brochure. It works by using a series of needles and threads to stitch through the folded pages, creating a sturdy and professional-looking binding.