I think it depends on perspective. They have to adhere to Maxis/EA/Sims 4 standards, but IMHO they are just still just CC/Creator Content (I don't even get Creator Content Kits). But if you bought/like the Creator Content Kits, you might be able to have/like Maker Content Kits.
I can almost immediately tell something is Marker/Creator Content/CC and not official Maxis/Sims 4 content. I remember the first time looking through kits before I knew some were Creator Content, and pretty much 99% of the Creator Content Kits I was like "this just looks like CC" just to find out it basically was.
CC/Creator Content/Maker Content just always looks off to me (not to say I am not impressed with the effort, I mean I am impressed at the work, it just isn't for me), but I am someone who notices more than I should (IRL people just say I have a creative/artist eye LOL).