But Kylo Ren is trying to be like his Grandfather AKA (Darth Vader) weaker than a an average sith but also he is a sit lord in training but I dont think he would win against Darth Vader because Darth Vader learned the jedi way when he was Anikain Skywalker and when he turn to Darth Vader he learded the sith ways so Darth Vader would win.