No, take Reason as an example: it is basically Ocaml. Despite having a C-like syntax, it is quite different from it. The syntax barrier is usually much smaller than the language itself.
I’m perfectly fine with a page that says, “here’s a code sample - notice that it looks similar to C, but here’s a list of reasons / an explanation of why/how it’s actually quite different from C.”
One of my favorite programming books of all time is K&R, from back before ANSI, even. It said, “here’s a simple problem to solve, and here’s how you solve it in our language.” Repeatedly. Explaining how the features helped to solve the problem at hand. It was revelatory. And it assumed its audience to be knowledgeable programmers. It didn’t spend the first chapter just describing all the features or how great the language is without showing any code.