I don't think its the same planet. Besides, these covenant munchkin engineers have shrunk again in size. Probably by covenant movie 2, the engineers will be the size of lilliputians and we can all go off galavanting on some gullivers travels in space adventure.
BUT, there is that black/charred spore pod floating up to the covenant crew's ear in the first trailer which seems to be the same color as the dissolving engineer in Prometheus.
Which brings me to another point. The Prometheus engineer dissolved, yet the pompeii covenant engineers don't dissolve but petrify. Unless there are 2 strains of goo - liquid to react with solvents like water, and black gas when airborne/spore particles.