There is no benefit to using express vs just plain priority mail for international destinations. It takes just as long. USPS used to have a policy of refunds for late deliveries but they quietly canceled it and are now treating both exactly the same except the "Express" option costs twice as much but still takes 2-3 weeks to deliver (if you're lucky)
Factsheet
i know the difference between the two:
https://www.usps.com/international/priority-mail-international.htm
https://www.usps.com/international/priority-mail-express-international.htm#legal-disclaimers--definition--2
it seems that the only real difference is the delivery time. i read some other forums where a seller was complaining that he paid for priority mail express international but the item got to him in 10 business days.
from your experience, does it really matter which option you choose? seems like USPS processes all these items the same and are just marketing a money-grab option....
price difference between the two options is only like $20, but just wondering if it's worth it to go priority mail express international over priority mail international.
thanks