Phuket, Pattaya or Koh Samui? Where is cheaper and better?

Phuket, Pattaya or Koh Samui? How to make the right choice and not regret?
I lived in Phuket and Pattaya, but I’ve been in Samui for over a year now and I have something to tell you about! I will compare these places according to 12 criteria and at the end I will answer the question of where it is better to relax and where it is cheaper to live!