Which one is best for simulating wireless power transfer circuit? 1. simulink 2. simscape 3. simscape specialized power system ?

Most of the circuit that i seen are designed with simscape specialized power system but one of my friend said that its very old and avoid using it.

Another thing is how can I vary the distance between two mutual inductors in WPT circuit?

how can I get frequency vs magnetic field graph?

and

efficiency vs distance graph?