Most of my pins are from WDW but I have a growing number from DL...two reasons.
My adult children visited there this pat February and I babysat for five children and three dogs and one cat. As a reward they brought me two of everything, one to keep and one to trade on our trip to WDW this past April.
Second reason...I think the DL pins are nicer, better quality and although the prices are the same, ($6.50, $8.50, $10.50, etc.) I feel you get a better pin for your money than WDW.
WDW is still my favorite place but I wish their pins were comparable to DL.