Red Mage (1-003C) is one of the easier card to distinguish between Wave 1 and Wave 2. But first, let me give you the links from the guides from the introduction post that will help you guide your way.
“Distinguishing Final Fantasy TCG Opus 1 Wave 1 from Future Waves”
“Differences in Opus I Wave 1 Printing vs Later Waves”
All you have to do is look at Red Mage’s Colon. And, if you look at his face you’ll see that he is not excited about that.
Which one is which? If you check the colon right after the cost to pay for the ability you can see that the one on the left is lower than the one on the right. It’s that little detail that shows up on all the cards that have an ability with a cost.
And if you look closer, you can see that Red Mage’s hair is lighter in Wave 1 and darker in Wave 2.