I just mounted a top case on my Grandvista which is very similar to the 2nd example. I like it very much. The 30L size will hold my FF XL Scorpion helmet.
But I don't know if your scoot has a rack on the back, where mine does. With a bracket included, it seems like a pretty good value. I paid $75 on sale for the Givi E30N, which has a taillight option.
Hope this helps.