dudes, i found this in another Chinese forum, just for sharing & please share ur thinking as well.

sorry if i messed it 1 way or another coz i translated it directly.

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Added on May 11, 2012, 9:59 amvios top spec：RM90,000 & Prius RM139,000

    D/P = RM15,000. Inerest = Vios 3.5% Prius 3%，5 years。

    RM75,000 * (3.5%*5) vs 124,000 * (3%*5)

    RM88,125 vs RM 142,600

Installment = RM1468 vs RM2067

   
FC = RM400 vs RM200

  TOTAL UP = RM1868 vs RM2267，VIOS IS RM399 CHEAPER。

    SERVICE = Prius 10,000km（RM400)，Vios 5,000km (RM200）

    SO EQUALLY RM200 vs RM200

    Depreciation:

5 YRS LATER = 45％（15％＋10％＋10％＋5％＋5％）。

    RM90,000 *0.55 vs RM139,000 * 0.55

    Prius changed battery during the 5 yrs period costs RM8,000. 

   
Summary ( Loan + Int.)

    RM103,125－RM49,500=RM53,625  vs  RM 157,600 － RM76,450 = RM81,150

    total FC = RM24,000 vs RM12,000 (+RM8000 battery)

    Maintenance RM12000 vs RM12,000 （it says Vios should be cheaper)）

    calculate without annual Insurance & R.tax

  Vios' owner has a total of RM23,525 saving compare to Prius (& it says it could covers Vios's fuel for another 5 years)