Thought i'd give it a go this evening as it's something I've been wanting to try for a while. The section on the right is Tunisian Simple Stitch and on the left is Tunisian Knit Stitch. I much prefer the Simple Stitch, it makes a firm fabric with a nice waffle type pattern. The Knit Stitch is very thick, almost like it's a double layer. Glad I've tried it, now i just need to find a practical use for it!