you maked any time this question in your mind? What clan is the better Uchiha or Uzumaki? At moment noone knows who is the better in the future episodes the people will discover the stronger clans what are. I think are more members in uzumaki clan but noone knows the true. In Uchiha clan all knows are 2 members,Itachi and Sasuke but in Uzumaki clan only a member we knows.