hello,
confederal means Weak or loose organization of states agrees to follow a powerful central government. Nations can choose to follow or not follow the lead of the weak central government. Examples: The Commonwealth of Independent States (CIS), formerly known as the Soviet Union. Also, Switzerland's canton system and the Confederate States of America (1861-1865). but federal means Having or relating to a system of government in which several states form a unity but remain independent in internal affairs. those are the diffrences