If i rmember correctly, the Disney version played too much bgmusic. The thing i remember clearly was the Quailman segments. In the Disney version, he started talking pretentiously and would even get his own episodes. You know that part where they walk into the basement and turn on the light, it doesnt say "doug" it says Quailman. As for the nick version, he would just use his regular voice and every episode he would appear in would still be under the Doug title.