Remember, this started out as "I have the same lens, but you get better pictures; what body do you use?", so I was trying to separate the technical body/lens question from the artistic questions, because I believe that your real question is much more complex than someone would infer from your choice of words.
Some people will get better pictures because they have better equipment.
Some people will get better pictures because they have better instincts when pressing the shutter button.
Some people will get better pictures because they happen to be at the right place pointing their camera in the right direction (suppose a CBS camera had been positioned next to Abraham Zapruder and had pointed that camera at Mr. Kennedy's car just as he did)
Some people will show better pictures because they take lots and lots of pictures and then do a very good job of winnowing through their results and picking just the superior ones. This is an area of growth for me, because in my earlier years I didn't have a motor drive on my camera and I was parsimonious in the use of film, so I need to learn to leave some selection to after the event.
Some people will show better pictures because they have superior post-processing skills.
The example I like to use comes from the first (IIRC) Chama Steam. It shows #463 trundling off into (temporary) retirement while snow swirls around it. It is a very moving/lonely picture, but as far as I know, only one person took that picture, and getting that picture required a whole collection of the components mentioned above.