Prang Colored Pencils

Sometimes, the box just says "Prang", and sometimes he says "Dixon Prang. What is the difference?

I'm surprised you do not have a "Wizard Prang" pencil.
But while America!

In England, a "Prang" is when two things collide, and describes the damage or cancellation as a result. A Dixon Prang is when someone named Dixon is involved.
In World War 2 when the pilots shot down an enemy plane, they used the phrase "Oh! Wizard Prang! "To describe their success.

See how different things mean different things to people on the face of it speak the same language?

it does not matter. there is no Holy Grail of art supplies. everyartist has a preference, but in the end it is the talent of the artist. more often than not you can do both with supplies at low prices Wal-Mart brand.