Donor Fee is $97/Year which allow you to access Junior VIP Section and some more features.
Whereas
Thread Approval is for thread which will be live in Marketplace after review by the MOD and its one time fee.
That is ALMOST correct. However, it is important for the OP (LiveSolution14) to know
that if he paid the $97 now, he would be a DONOR (pink name), but would not be able
to apply for a thread in the Marketplace. If he paid $97 now, the advantages are that
he would have a larger capacity PM inbox and be allowed to have a banner link or up
to three lines of a text ad in his signature.
If he paid $97 now for the above advantages, he would STILL need to pay an additional
$97 to become a Jr. VIP after he reached 100 or more post points.
Some members wait until they have 100 post points, then pay $97 to become a Jr. VIP.
Hope I have made that clear.
"Wiz"