They are clearly meant to be the same Time Lord as the Doctor and not Morbius.

The Doctor is loosing the duel, he is regressing through his incarnations and the images come after he has regressed to Hartnell so they are previous incarnations of the same man.

Morbius asks with surprise how many lives the Doctor has had.

If they had come when the Doctor began to win it would make narrative sense that they are Morbius.

It can't be a coincidence that the War Doctor is born in the same place.

Don't forget this is also meant to be the same person :