The harder the surface of the racket, the more control you have over the ball. However, this also means a loss of power. And if you have ever had tennis elbow, you will quickly notice that a hard surface absorbs less energy and puts more strain on your hitting arm.
If the racket has a softer surface, which absorbs more energy, this is also easier on the arm. At the same time, the ball stays "stuck" to the padel racket longer and you have a faster stroke or smash. However, compared to the hard surface, control is lost.
So soft rackets are more suitable for players with arm problems or advanced and tournament players.