The author of Passage 1 lauds the benefits science has produced, while the author of Passage 2 speaks hopefully of possible future benefits.
Both of the passages react with distrust to the idea of using science to assess chimpanzees.
The first passage lists the studies that showed positive chimp interactions, while the author of Passage 2 refutes their claims,
The first passage suggests that science can have a positive impact on perceptions about chimps, whereas the second passage views science as almost universally negative.
The author of the first passage is more apt to justify using chimps in science than the author of Passage 2.