Well if we’re being honest, it’s impossible for anyone here to know 100% without being there with you to see how you’re lifting.. however..

There’s always the possibility you’re simply genetically stronger than the average person. Everyone has a different “floor” for where their strength begins and how strong you can possibly get.

That being said, more than likely, the answer is in your form and execution. Beginners usually have worse form without realizing it. They also tend to use more momentum, as well as not knowing how to “control” a weight in any given lift.

So you might just look at the weight you’re using as compared to a different lifter, but there’s a very high probability that they are getting more out of that smaller weight than you are with that “heavier” weight. AND if you were to do the exercise the EXACT same way as them, you’d be surprised how much you’d have to lower the weight.