Service fee % and Repair fee %

Is there's a wiki page for these? Sometimes I don't know what the service fee % on enchants / items do , Nor do I know if the enchant is +% repair or service fee.

Take Basic enchant rank 6 prefix , it says its + 12% repair cost, but on an item it says +12% service fee

So does it really repair more, or what?

Service fee and repair cost increase is the same thing.