There are a lot of missions where killing vs not changes the ending a bit. Especially since cyberpsychosis is a soft spot for Regina. It wasn't hard to knock her out by distracting her with the tire balancer but she registers as dead regardless of how you handle it. Not even an option for Reg to step in to recover the Mox to help treat her like the other cyberpsychos. The Mox could've owed V a favor, but I guess we'll never know.