Welcome to the board Skoda
There are countless threads comparing Pattaya and Phuket, which is beat is all a matter of personal preference. That said, wherever you go you will become addicted and sooner or later you will have visited both.
Here are a few search results for Pattaya / Phuket:
Pattaya or Phuket
phuket or pattaya
Pattaya VS Phuket - the results are in...
Phuket or Pattaya
Phuket, Bangkok or Pattaya
Pattaya or Phuket???
There are many more ...