Kakashi's talent in Chidori pales before Sasuke's, by a large margin, in fact. Sharingan gives Chidori precision. Without it, Kakashi will not be able to use it at high speeds at all. So, there goes his Chidori usage against tougher opponents who can evade and counter his movements. Sasuke has shown the ability to make precision strikes despite being on his last leg, nearly blind and without Sharingan.
He is also is fully capable of adjusting the focus of chidori on two fingers or three or full, making it deadly or mellowing it down. That is a testament to his phenomenal chakra control. Only Third Raikage is capable of this feat as well. Kakashi is incapable of doing this as well.
His variants are mediocre and lack the multimodal and multidimensional aspects of Sasuke’s, where each Chidori technique can be used in a variety of ways. This just goes to show that without Uchiha eyes give him the necessary prop, he’s pedestrian ninja at best.
