What is the difference between pre order and pre purchase?

Related questions

1. Should I pre order or wait?
2. How long do pre orders last?
3. What is FIFA tax?
4. Is Sora a Square Enix character?
5. Is Gameloft owned by Ubisoft?
6. Do you get a game early if you preorder it?
7. Do pre orders arrive on release day?
8. Is EA owned by Disney?
9. Is it cheaper to pre order games?
10. Who owns Sora Disney or Square?

Tags

1. #released
2. #within
3. #which
4. #place
5. #later
6. #immediately
7. #order
8. #shipping
9. #until
10. #purchase
11. #product
12. #placing
13. #shipped
14. #charged