A very difficult decision indeed as they are two different classes of car.
As both of them are second hand please check out the following:

---- Criteria ------------ Weight ---
1. How old (# years): 4
2. Mileage run ( Km): 3
3. Body Condition: 2
4. Price demanded: 4
5. Fuel Efficiency: 4

Rate the cars in these 5 points in a scale of 1 to 5 ( very low, low , medium, high, very high ) and multiple them with the weight factor.
I assume that driving comfort, passenger space, car internals and spare parts availability are almost same in case of Ikon and Safari.