I always thought Judie had the more romantic interactions. Personal preference is a mayor part in this judging this; what matters are not the interactions themselves but our emotional response. If the community is split 50-50 on who's the best girl, then that's great character design. There must be at an old poll about this, right?
If you'd allow me to vividly theorize: Judie's path relies more on affection from your side, since she's shy. But replaying the game as much as you did makes you become numb to it since you've done it so many times already. Therefore, Lauren's more active way of affection becomes the prominent one. How's that? :)