This is most likely a homophyllia bowerbankii, you can tell by the skin texture. and skeletal formation.
Definitely a Wellso; Skin texture and coloration tell me that outright.
Acanthastrea pachysepta was considered Lobophyllia until a few years ago, and a lot of people are unwilling to accept the change. Pachysepta almost always has the orange to purple fade, while Lobophyllia hemprichii has a rougher skin texture & more variable coloration. Though if it isn't attacking the duncan its more than likely an L. hemprichii.
As for lobos, I have never owned one but have been searching for the perfect solid red one for years. It's hard to find a red one without blue or green mouths, which I really don't like the look of.