You can use it to refer to people or things that are different from others. For example: "Some students find the assignment easy, but for some others, it requires more effort.".

"some others" is correct and usable in written English. It is used to refer to people or things that are additional to or different from those already mentioned. For example, "The blueberries are ripe, but some others aren't ready to be harvested yet.".

Example sentences with Some Other Every new beginning comes from some other beginning's end Seneca Gain cannot be made without some other person's loss Publilius Syrus Some other time English idiom Those who make some other person their job... are dangerous