Response B is better because it follows the prompt instructions more closely, stays on topic, and provides more clear, correct, and complete information for the flirty comeback the user asked for. Response A is also helpful, but it adds more interpretive framing and feels slightly less aligned with the visible conversation.

Response B works better since it sticks closer to what you actually asked for, keeps things on track, and gives you clearer and more accurate advice for that flirty comeback you wanted. Response A is pretty helpful too, but it adds extra commentary and doesn't feel quite as connected to the conversation you showed us.