Difference between Advance line and Pro line keyboards?

The difference is on the way the keys are color-coded. The Advance line uses a special printing process to print on the keys with a lacquered protective finish.

In the Pro line, we mold color onto the keys and replace the keys entirely, therefore, it is more labor intensive but it gives a more polished look to the keyboard. Both last just as long.

Knowing this, I think that if you look at the photos on the web site you will see the difference.