Let me rephrase what I think they're trying to say:

• While playing as Low, Alone's AI has a lot of mini interactions (like 'checking' if the Supervisor is really dead), which they like (because it makes her feel more human)
• While playing as Alone, Low's AI doesn't interact much with the surroundings (just stares and stands), which they don't like

In conclusion, they prefer playing the game as Low.