"inferior version" is a correct and usable phrase in written English.
You can use it when something is described as being of a lower quality, or less effective than a more advanced version. For example: "The basic model of the phone is an inferior version of the premium model, and does not include as many features."
Those kids are not an inferior version of yours.
It could be the most controversial technological break-up since Apple ditched Google maps for its own inferior version.
(The American version was itself a slightly inferior version of the more trenchantly observed British version starring Ricky Gervais).
This isn't an inferior version of the Steve Waugh side, or a less fat version of AB's Australians – even though, of course, it arguably is both of those things.
As he had said that afternoon over lunch at a vegan restaurant in the Silver Lake neighborhood, "I even tell the audience, 'You're getting an inferior version of the joke so, I can work on it myself".
Although he always maintained that he got an inferior version that only worked when he housed it in a new chassis, Sheene finished the season as world champion in the F750 class.
Dunga packs his midfield with two inferior versions of himself.
You can only reproduce what he did already or create inferior versions of it – hence the cheap Mies knockoffs that came to characterise the international style.
If all the Web is doing is creating jerky, inferior versions of the stories that make up movies and TV shows, why should people pay attention?
The West tends to be proprietorial about Modernism, treating it as a Euro-American invention copied, in inferior versions, by the rest of the world.
But let's remember that a Republican administration likely would have moved school lunches even more in the direction they were headed: inferior versions of bad fast food.
