The differences are minimal.
Technically you could say the DVD+R is superior in some ways:
-DVD+R is newer (released in 2002 vs 1997 for DVD-R)
-DVD+R supports drag and drop
-DVD+R checks for errors during recording
-DVD+R users can format and record data together
-DVD+R can be written many times
-DVD+R less risk of interference and error
these are some of the benefits promoted by the DVD Alliance (which backs DVD+R vs the DVD-R which is backed by DVD Forum) but in practice I’d say the average user won’t need or notice a difference.