About replicants, the older models under Tyrell had more free will than the current ones in 2049. They had no safeguards and it wasn't until after Nexus 6 that they started even using memory implants. I would say someone like Roy Batty and the Nexus 6 unquestionably was basically almost human on an emotional level, he had emotions, love, sentiments about his experiences, and even self-preservation instinct. The Voight-Kampf test in the first one tried to see if they lacked empathy, because they lacked emotional experience that a person would have (like asking if they would help a turtle and about their mother, something they wouldn't have experienced). But when Rachel came into the picture, who had implanted memory, she basically almost passed it, taking over a hundred questions before he could say she was a replicant. The test in 2049 tried to make sure they had no empathy, and made sure they were a robot. Wallace wanted replicants to go in the opposite direction, and instead of making them more human, he made them more machine. But K breaking his programming basically showed that the new replicants do have similar sentience as the older versions, which basically means they pretty much are indistinguishable from humans if they were let to be and didn't have whatever shackles the corporations put on them emotionally.