This is my first pair of Glycerin purchase and I’m glad I bought it. I’ve been a long distance runner for 30+years and I’ve only used the Launch, but wanted to give the glycerin a try. It’s attractive but will not work for me in long distance runs due to the weight, which is noticeable more on the glycerin. The glycerin would be better for those looking for more cushion and maybe on shorter recovery runs/jogs/walk. The Launch has a much lower heel and lighter glide. Overall, great looking.