I dunno about the throw art... but I think originally the Dx meant Deluxe
I use throw art strickly for rollers. I know discs are suppose to fly, but if it is not suppose to roll, dont make them circular. LOL. For some reason Throw Art discs are just as stiff as Star Plastic in 175 weight. Only difference is that the Throw Art stands up alot slower than the Star plastic does. Seems like the Throw Art plastic is more durable than the DX as well. Just thinking that some Tee-Rex in throw art plastic would be hella nice.