Ray allen or reggie miller, who was the better player?

Statistically, Ray Allen has historically had a higher Player Efficiency Rating and played more minutes, but Reggie Miller has contributed more wins for his teams and played more games. It truly is a toss-up on advanced stats, depending on what is more significant to you, but since you asked about these two, I imagine you are looking at shooting primarily. In that case, Reggie Miller was the better shooter, as he outpaced Ray Allen in every shooting category except for free throw percentage.