Sorry to hear your'e going thru this. IMO they both suck. Each company 'lost' an expensive integrated amplifier during shipment ... somehow. However, to Fedex's credit they are quicker to process claims. UPS customer service is the WORST to deal with and it's no wonder.. it's a leadership failure. I will never use UPS again.
I recently drove 4 hrs to buy an amplifier rather than risk it being damaged, lost or stolen via these two delivery companies. Hope it works out for you in a good way.