To be honest I don’t see the deference that you’re speaking of. They all look like snaps to me. I do notice you have an ongoing problem with white balance. (Example: look at the third shot you provided? See how her skin is yellow, but the whites of her eyes are blue?) Read your manual, and learn how to custom white balance. This alone will improve your future shots immensely. I see you are experimenting with studio lighting. Look up or google
Split lighting
Loop lighting
Rembrandt lighting
Butterfly lighting
And broad and short lighting
Experiment and get to know each pattern and how broad and short lighting affects your photographs. I think you will have better results than just winging it provides.
I hope i helped a little, happy shooting 🙂