Well, whatever the Absolute spawned there, it's definitely it's own kind of illithid. This includes the Emperor who at least claims to have memories from before ceremorphosis. According to the Illithiad (2e) typical tadpoles would simply eat the brain of the host, destroying the mind and all memories; then turn the body into a mind flayer that has to go through infancy. With the hybrids we see in BG3, the Absolute has created a super soldier for the grand design. A modified ulitharid tadpole would be truly horrifying!