Kind of a stupid question IMO.
People should stop asking these questions, the answer should always be that if you care about health you shouldn't compare hamburgers, you should eat actually healthy things like a salad or whole wheat, tofu, etc.
And yes, vegan burgers are "healthier" in the same way as getting shot in the leg is healthier then getting shot in the chest.
And I am a vegan and agree that there should be awareness around the health benefits of it, just stop thinking that by eating vegan burgers you made some sort of step towards a healthy diet.