The Bunnings Workshop community can help with your home improvement projects.
The more strokes per minute the faster a jigsaw can cut, but there are other factors that contribute as well. The stroke length is the distance the jigsaw's blade travels up and down. The longer the stroke length of a jigsaw, the faster it is able to cut. This is because more teeth come in contact with the workpiece per stroke. - MitchellMc
Higher speed potentially faster cut but depending on what you are cutting and blade type not necessarily an advantage. Stroke length determines how thick the material is you can cut. - JDE
Workshop is a friendly place to learn, get ideas and find inspiration for your home improvement projects