In summary, the main differences between these three types of sutures lie in their structure and application. The sewn lockstitch stitch is simple and strong, the sewn chain stitch is flexible and ideal for stretch fabrics, while the sewn overlock stitch is essential for finishing the edges of fabrics.
In practice, depending on the design and type of material, different types of seams and sometimes even combinations of them may be used. Therefore, it is worth having knowledge about various sewing techniques to be able to choose the right one for a specific task.