Who has more cognitive abilities, a fetus or a dolphin? Does it mean the more cognitive feels more pain?

and if the dolphin and ape are the more cognitive and feel more pain, then why is their suffering of less concern to pro lifers than that of a fetus? because its human? that makes no sense, humans aren't special if theyre not on mental par with dolphins or apes, theyre the same value as animals at that point. if humans have a soul so do all the other animals because humans are animals, we evolved from an ape like creature and its proven in our dna and the fossil record, it has more evidence than the bible. without god there is no reason to prefer mentally deficient humans over animals who can mentally outperform them.