We usually say that no two students are alike. They may differ from each other in terms of

No two students are alike, and they differ across all these dimensions together, so every listed factor applies.

Upbringing and social status shape a learner's values, language and readiness through the home and community.

Aptitude is an individual's innate potential or capacity to acquire a particular skill with training.

Attitude is a learned, relatively settled disposition to respond favourably or unfavourably towards people or ideas.

Because each of these genuinely varies between individuals, no single factor alone can be the complete answer.

Such variation is the basis of the psychology of individual differences, first systematically studied by Francis Galton.