We've traded in both. My observationis that there seem to be a LOT more traders in each park at WDW. Also, at WDW, nearly all the traders wore lanyards. We only saw one single lanyard at DL and none at DCA when we were there over Christmas. The ONLY place we saw traders were in the shops (there may have been one exception, I don't clearly remember) and except for one instance, they ALL were on pinboards or in portfolios. Either it was placed where the public could get to it without disturbing the CM, or it was behind the counter and the CM would set it in front of us on request and then continue about their business of serving the never-ending lines of purchasers.