The being taught, possibly born into Sith servitude or raised by his master, exclusively Sith teachings? Or the fallen Jedi, taught the Jedi way before embracing the dark side and learning the way of the Sith?
Examples of “pure” Sith: Darth Maul, his master Darth Sidious.
Examples of Jedi taught: Count Dooku, Darth Vader, Revan.
Conversely, which makes the better Jedi?
Please, discuss.
I will render my own decision soon.