VADA v. USADA

[Kirkland Laing]

USADA say they do.

USADA counters Conte assertions - New York Boxing Blog - ESPN New York

So, is there any real difference between the two?

USADA seem to have a deal with Golden Boy that allows GBP to withold positive test results and/or other dodgy stuff. Here's one article but there's lots more by this journalist and Thomas Hauser :

Max Boxing - News - USADA, Golden Boy and Positive Test Results Management - Part Two