What’s the best formula milk na pang salit kay baby?

Which is better between the three formula milk, Nan optipro one, S-26 gold, or Similac 0-6 ?? i’m currently using s-26 gold pero parang hindi type ni baby by the way i’m mixed feeding most of the time mas gusto nya talaga yung breast milk kesa sa formula, my baby is going 5 months na this coming march 4. Baka meron din kayong tips para lumakas dumede si baby? Thanks?