around here they sale the load of mulch at the same price for the homeowner or a company. there is no difference. you usually just buy the load and then add a bit to it to cover the cost of driving to pick it up and so forth.
i'm doing a mulch job next week. the owner is getting the mulch himself in his own truck. i just have to shovel it out and put it in the beds for him. every job is gonna be different.
check around for prices though. one place here charges $40 a load and another charges $25 per load. i'm not sure how many yards are in a truck load of mulch. they don't really go by yards here they just scoop it up and charge you by the scoop. one scoop fills the back of a truck up. not sure how many yards are in a scoop.