The bike is just the same as activa 3G.Not much differece.The change in shape does not change the features.I think activa 3G is better activa 4G.The 3G had the newest technology but 4G dont have as such.There is need of inprovement in the activa 4G.The average, speed, efficency everything is same as activa 3G.Activa 4G needs improvement.