Board Thread:Naruto Discussions/@comment-26388300-20150723025334/@comment-28869806-20150813013939

Rinnegan as it is IMO the stronger dojutsu and doesn't fade away after awhile (After Toneri's fight with Naruto Toneri's Tenseigan faded away and became a normal Byakugan implying that the Tenseigan is a temporary power up.)