Tantrum or Meltdown?

While I was at the mall this weekend, I saw a beautiful toddler having an all-out — tantrum or was it a meltdown.  To my eyes, it was a meltdown, and the dad was doing a great job being calm and lovingly while he carrying him out of the mall. So, what is the difference between a tantrum and a meltdown? And then, is there a difference in how to handle them?

Here is a nice chart from understood.org….