It’s interesting that you ask if they are vegan, as if understanding the ethical problems of eating meat would only be valid if you are also strictly vegan.
You evidently understand it is not completely ethically correct to eat animals in all circumstances, as you say you only eat ethically harvested meat. But you also say you believe humans to be special as a reason to eat animals, so why not eat all animals under all circumstances?
The main point though, why would it still be wrong to eat human meat if lab grown and consensual?