No difference. Both are same and can occupy a variety of large engines like 3,4,5A. My friend had swap with Toyota 1300cc EFI engine and the car became awesome. Much better than any other small car (Like Vitz, Cultus, Alto, etc) in pakistan. But try to swap through good mechanic and specially electrician. Here in peshawar many of the guys had adjusted a variety of large engines of Toyota, Honda in these Charades in quite reasonable prices. Best of Luck.