Certainly when it comes to the original claim about OMNI/PR, the distinction is a quibble. There's no content there that could be confused with being "helpful" in a practical sense.

Overall, I do think it's a quibble and while they are not literally one and the same, in practice most people can and will use them interchangeably even if some people will choose to read them literally.

To my mind, that speaks for choosing a less specific wording if given the choice, but as I said up-thread, I think most people are sophisticated enough not to read too much into votes even if given a more specific label like "helpful."