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I have attached two designs both the designs are same but Output capacitor value is different

TOPSwitch-JX_PIDesign1 (1) C9 = 330uF X8

TOPSwitch-JX-1 C10 = 1200uF x5

Both are output capacitor .

In both design input & output specification is same

Please share the answer with justification which one is correct

Can you share what did you do to arrived at
TOPSwitch-JX-1 C10 = 1200uF x5 ?

When I used the https://piexpertonline.power.com/
I get the results of TOPSwitch-JX_PIDesign1 (1) C9 = 330uF X8

You should follow the 330uF x8