A FedEx TVAL truck is a White Glove Truck that is fully equipped with all W/G requirements,gear and a reefer but, the reefer has to go thru special stringent test to become TVAL qualified therefore not all W/G reefers are TVAL. TVAL is a step up from just being a reefer. Not all reefers can meet the requirements and some people just don’t want to go thru all the testing to become qualified.
I hope this answers your question with out sounding redundant.