Nan vs similac or other formula. What do you mummies look for in the formula?

What i look for in a fm is tat my bub takes well to it,that is the most important. And I agreed with some of the mum mentioned that sg fm selling really ex. E.g for the price of fm per tin in sg , u can get x2 tins in aussie. Comparing similac vs nan (in the process of switching my bub to nan cos some said d taste is closer to bm) is that : Similac - sweet smelling and the fm tend to take longer time to dissolve after preparing,texture slightly thick. Nan- no strong smell and the fm dissolve faster n texture not so thick.