There is enough separation between the two of them. The number of privacy features in the official WhatsApp is limited. As you are aware, we are unable to conceal our opinions regarding other people's status updates, our own online activity, blue ticks, etc. Completely of the aforementioned capabilities, however, are accessible with WhatsApp Plus APK and are all free.
Except for WA Business, neither the official nor the third-party versions of WhatsApp have sticker makers, built-in cleaning features, auto-replies, chat screen customization capabilities, or any of a number of other features. But WhatsApp Plus has these functionalities as well. This is how WhatsApp and WhatsApp Plus differ greatly from one another.