Personally, I actually prefer UPS to USPS for the fact that every time I drop something off at UPS, there is a short line and they always scan my package immediately and offer me a dropoff receipt. USPS almost always has a line when I have a chance to drop something off and they only scan packages at a rate of 35-50% at most. Whether I wait in line or not, USPS always tells me to just drop the package off at the front desk. Because of this, I sometimes I don't get any tracking updates until my package is already in SoCal.
Also, I believe GOAT has had instances of high value shoes being stolen or lost by USPS. I believe a member noted that Yeezy's they had purchased had been stolen.
So, UPS is far more trustworthy or reliable in that instance as well. Their insurance policies are better as well too from my understanding.