I got all the rules of writing RS nomenclature for Perspective formula of chirality center only problem being, I m confused that given compound can have any configuration depending on how I write the perspective formula. It's basically Same Molecule
You're right, the two compounds you depicted are basically the same molecule except for in their chirality. They are, essentially, enantiomers of each other.
by the Cahn-Ingold-Prelog convention we would call the molecule on the left S-bromochlorofluoromethane, while the one on the right would be its R-enantiomer, i.e. R-bromochlorofluoromethane.