pdq said,The difference is that the White singers commonly used 16 bar structure, Blues singers 12 bar. These are sometimes called White Blues."
I've never heard the term "White Blues" applied to a chord progression. I wonder if he/she is referring to the Jimmie Rogers type of blues, which is essentially a 12-bar blues with a four bar yodel tacked on the end.

Jimmie also often changed the chords a bit:
I /IV /I /I7 /IV /IV /I /VI7 /II7 /V7 /I /V7 /
Yodel- I /V7 /I /V7 /