Although beef jerky and biltong are both dried meats, they differ in taste, texture and how they are made. Jerky comes from America and the meat is typically lean and is sliced into thin pieces before being marinated in a mixture of sauces after which the product is dried in a few hours at high temperatures in drying ovens.
This differs from biltong where the fat is left on the meat and the pieces are sliced into large steaks which are marinated with spices and vinegar before being air dried at ambient temperature over a few days. Lastly, the steaks are cut into bite-size pieces.
Biltong will taste more like a steak that’s being seasoned with simple ingredients from your pantry whereas jerky will usually be chewier and taste like the sauces that have been added to it. You can read more here about Biltong VS Beef Jerky.