That's not exactly the same scenario. If Ford allowed installing radios only via Ford
and allowed other companies to sell radios via Ford, but then artificially restricted said radios so that its radios would have an advantage then it would apply, and I suspect that people would be upset.
Here's IMHO a better analogy: Apple is running a mall, while also operating a chain store operating in said mall. Apple Mall allows competitors to Apple Chain Store to rent stores in the mall.
However, it turns out that for some reason, there are "Beware of Leopard" signs near the competitor stores. Also, the public area near them is never cleaned or maintained, except for signs promising cheaper products at the Apple Chain Store (and the leopard signs of course).
Would that be legal? Apple Mall is hardly a monopoly. Despite losing the location, the other stores could move. None of the agreements specifically bans this.
For some reason though, I don't think that would fly - the other stores have a reasonable expectation that after paying rent Apple won't sabotage them. Just like companies paying for the Developer License and Apple Store tax have a reasonable expectation Apple won't unduly hinder them for its own products.