Both sides are actually equally powerful, but the dark side helps you unlock your potential faster. It takes more time as a Jedi

I think it depends on the force user the sides are just Vessels

@Mando With No Name Interesting! I never thought about it like that. Thank you so much for your thoughts. That’s some fascinating stuff!

My own vision is that only the strongest force users can actually "use" the dark side without it using them. Obi wan always say that it takes strength to resist the dark side, and that only the weak embrace it. But I believe it takes the biggest strength to use it without being full on changed by it. Why you may ask? Well, it's because of the Sith teachings and the insight that Darth plagueis for example gave in the novel by James luceno. He talks about how the jedi don't use the force, but ask it for help and let it guide them. He says that they (the sith) are the select few who refuse to be carried by the force but carry it instead. That they always take from the force instead of asking, they channel all strength from within and use their emotions to fuel that strength. But technically speaking it's not just negative emotions that a Sith is supposed to use. But all emotions. Yet you see a lot of Sith who become more and more murderous or start becoming some sort of addict But there are Sith out there that aren't murderous psychos. They seem to have control. Notable Sith like Darth Marr, Darth Malgus, the emperors wrath, Darth Nox, Darth Plagueis, Darth Bane, Darth Zannah, Darth Vitiate/Valkorion, Darth Sidious, Marka Ragnos, Darth Vectivus. These Sith are all more powerful then jedi, what do they almost all have in common? They are the Sith with more impulse control then all others. They seem in control and don't kill and torture just for fun. Palpatine never really was that good of a man even before he became Sith. Darth Vectivus was a banite sith that literally after training his apprentice dipped out,went back to his family and died happily surrounded by his family and friends. Darth Malgus had for quite a long time even while being one of the most feared Sith warriors a relationship with a twi lek woman. He did end up killing her but this was not an impulsive action. He knew that she was a weakness to him but he also realised that if he were to kill his own lover he would always hate himself for it and therefore did it to turn his weakness in one of his biggest strengths even though it is kinda messed up.

Granted I think that if you were to just browse the wiki and compare force powers you would also find that the dark side has skills that the light side just can't compete or compare with. I see the dark side as a dangerous poison that only the absolute strongest can actually genuinely use without succumbing to its corruption and end up being used by it anyway. But that's my vision on it.

"It takes strength to resist the Dark Side, only the weak embrace it"

Letting the Dark Side consume you seems to grant more powerful abilities, but you often lose control of them and accidentally destroy what you love, since the Dark Side draws on and calls to your emotions. The Light Side is more peacful and orderly, so less destructive power will be used. However, when it is aligned with the will of the force, great power can come from the Light Side. The Dark Side involves seizing power from the Force agianst it's will, the Light Side is channeling it. So yes, on a small scale, the Dark Side could be considered to be more powerful, but using it is inherintly self-destructive, as evidenced by the collapse of the pre-Bane Sith, which is why the Light Side will triumph in the end.

Darth Tenebrous for one yes

I believe that using the dark side is actually an effort in self destruction.

Sith tend to turn on each other.

Jedi are unified and most importantly they’re sane and they have a wider skill set.

Using the dark side I'd compare to using steroids while lifting weights

You see the big lifters (Mark Henry, Eddie Hall) such as Yoda or Mace Windu for example, they would achieve that through time patience and hard work over the years, 'cheats' or not.

Using steroids, on the other hand, gives you short term boosts but destroys you from inside out similar to the Dark Side.

So short term yes, overall no

Traditionally in the occult its taught that white magic is related to influencing the spiritual realm while black magic influences the physically world. Both are equally powerfully, but to the weak willed and shallow, the lure of seeing clear and obvious affects of their power in action is more tempting than spiritual enlightenment.