What's the difference between hsv-1 oral herpes and hsv-2 oral herpes viruses?

No diff: There really is no difference between the two except the location on the body where they are found.

Practically nothing.: There is some difference in their viral RNA but both viruses act the same and are treated similarly.

Almost the same: They are now found in both the mouth and genital areas at just about the same rate. They have the same mode of action and cause the same problems.