Hmmm, Kakashi isnt really of Uchiha BL. All he has is a eye that is not his. Between Sasuke and kakashi, saying they both are bloodline is wrong. Sasuke probably has more abilitys of the sharingan then kakashi does. But by the saying that they are the same....Kakashi was indicating, the sharingan,

SPOILER(possibly)=
<span style='color:#D6DBE0'>As kakashi said about the heightened flesh. Maybe this is why he was able to use chidori. Not sure if this wasnt said so, i kept it as a possible spoiler. Sorry admins</span>[/CODE]