What's the difference between a 2 seam fastball and a splitter?

Is there a difference at all?

As I understand them, the fingers are closer together and finger pressure is greater and more balanced with a 2S FB. The movement is often later and sharper than the splitter. For me, it has more run than drop. The splitter is often slower with similar break characteristics as the 2S FB, but has a earlier movement and more total movement. Still much more velocity than a change up.