They look similar but they are a little different. The invader sides have "legs" on them where it goes up on the car which can be molded. The H-type (which you can get from Spoilers TO. or Revtec) skirts do not have the "legs" on them and the h-type are a little larger in size. You can get the invader skirts cheaper also and are easier to find.
Invader
H-type
