They’re called the same thing, but no one considers them to be similar.

It’s like how we use “chips” to refer to both crisps and fries. You usually know which ones it’s going to be based on context, and if it’s not clear you can always ask.

On menus and things, we typically would call it “traditional lemonade” to clarify that it’s not sprite.

Microsoft decided to skip Windows 9 because, after doing a lot of research, they found that a lot of commonly used legacy software had implemented compatibility hacks which involved checking for “Windows 9” to detect when the software was running under either Windows 95 or Windows 98.

Instead of breaking a lot of software or requiring a lot of updates (some of which could even be from vendors who were no longer in business) they decided to work around the problem by just skipping straight to 10.

Edit: My mistake, I responded to the wrong comment. But I’m gonna leave it here because I already typed it.