Originally Posted by Judge Dredd
From what I remember Thundurus-I had better stats then Thundurus T...I could be wrong though.
T-I had better Speed, and that AMAZING ability. T-T hits harder, but has the decent ability of Volt Absorb, as well.
Overall, T-I is FAR superior to T-T (imo). Priority with both Taunt, and Thunder Wave was F'N brutal.