There's no difference in the quality of the actual jersey itself, they are the same. There can be a difference in the stitching of the numbers sometimes. I've heard some horror stories of really bad stitching on a few custom jobs. The quality control has left a little to be desired.
It's generally accepted that EPS ( Exclusive Pro Sports) do some of the best work.
This is a genuine Ward throwback, 270337174450, are you a 48 size?