How to make hardwell/nicky romero

Please could you help me with this. I am DJ and my style is the type of progressive house these two artists make. I would really like to know all the elements they use in their tracks so I can learn. They have big pads and synths in their tracks with fat drums. Their chords are also very catchy!

Hardwell - Voyage:

Hardwell - Voyage (Original Club Mix) - YouTube

Hardwell - At the end:

- YouTube

Nicky Romero - My friend:

Nicky Romero - My Friend - YouTube