Montiporas are always a bit difficult and these are no exception. I would guess at the first being M. mollis, with the second M. meandrina. From my own experience with Montis, they tend to mutate in their growth forms in the aquarium, which makes them difficult to seperate without a skeletal examination. Matured colonies are often very different looking than a frag. Of course, this is part of what makes them so fascinating!