"I am similar to him."

Translation: Saya mirip dia.

[Mal205614]

"saya mirip ke dia" should also be marked correct

[Rick392366]

No.

'ke' is a preposition used to indicate movement to a location, it marks the direction or destination.
Like this :
Saya pergi ke pantai. = I go to the beach.
Saya pergi ke pasar. = I go to the market.

[neutrino3]

"lebik - ....... - dari dia, darinya"

can mean:

"more - .... - than him ".

Example: Saya lebik mirip dari dia. Saya lebik muda dari dia.

Native speakers please confirm/deny.