Being messed up for some years (and not for decades) surely means a disadvantage in a fight against someone, who can actually really fight. But I see Scarlett at best as an average fighter with average, that means rather little, fighting skill and experience. So I see Lindsay being messed up not as much of a disadvantage and her craziness and jailtime as more of an advantage.
In conclusion, I would have given the edge to Lindsay some years ago and I still do so now.