I have used stainless lines and regular lines on the same vehicle. They do not affect stopping distance.I actually have braided steel brake lines in a '15 XT.
They made a noticeable difference in pedal firmness and modulation.
Those who say braided steel hoses make no difference have clearly never used braided steel hoses.
The purpose of braided steel brake lines is not protection from debris. Their purpose is better modulation.