const someCondition = true

interface Func1Options { name: string }
interface Func2Options { age: number }

function Func1 (options: Func1Options) { console.log(options) }
function Func2 (options: Func2Options) { console.log(options) }

const selectedFunc = someCondition 
 ? Func1
 : Func2

selectedFunc({
    age: 20,
    name: 'Alastar'
})