It is definitely easier to access the USVI than the BVI. You take 1 test for USVI which is within a 5 day window prior to traveling and their portal is pretty easy to fill out. You do not need to take a test for your return to the US. For BVI you have to take a test within a 5 day window to traveling, get travel insurance, fill out the portal which can be a PIA, have a test on arrival and if you go back through the USVI for your return you have to get a test within 48 hours of traveling. If not going through USVI you have 72 hours to get a test and results. We went to the USVI 4 times last season and it was super easy to do. We did the BVI once and it was stressful but definitely worth it! That being said, we are trying our luck again and doing the BVI for 3 weeks this November even though we did love our time sailing in the USVI.