The way I see compression gear is that they are a much more specific term for the general name of ‘athletic apparel’.
A lot of brands like to throw around their own terms for the compression design and material to use as a marketing tactic.
Nike coined the fabric they use as “DRI-fit” material. While it sounds fancier and technical, it’s still a piece of compression apparel. At the foundation they are made of similar fibers compression gear uses. It’s simply a branding tactic, so don’t let that trip you up. Most items you look at when shopping for athletic apparel is most likely a type of compression fabric.