system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] How powerful is Luke? (Speculation)

He is parity. Where does everyone else fall out?
gpt
It's difficult to create an absolute scale for power when it comes to force users.  Different expertise makes them effective in different ways.  Was Mace Windu a better dualist than Darth Sidious?  Well, he did win a 1:1 fight, and Yoda "lost" a 1:1 fight with Sidious.  Does that make Mace more powerful than Yoda?  Not by any measure of the imagination, Mace was just somewhat better at going toe to toe with a single opponent and beating him in a lightsaber fight.   The depth and breadth of Yoda and Palpatine's connection to the force was likely much greater than his.  Was Luke more "powerful" than Vader?  he did win a lightsaber duel with almost no formal training, against an opponent who had the better part of 3 decades of battlefield experience.  But Luke was committed to the victory, whereas Vader was still attempting to keep him alive.  A fight between two people where only one of them is trying to seriously hurt the other is by default an unequal one.   
Kylo Ren probably has a great deal of natural talent despite limited training, but he loses to someone who has exactly zero formal training, who is doubtlessly much stronger in the force than him.  
A connection to the force can give someone many different abilities, and some are more useful in specific contexts when compared to others.