The term 'mathematical logic' is used somewhat loosely to refer both to the mathematical study of logic and to particular formal systems of logic. Since you are asking to contrast it with Aristotelian logic, I shall take it that you are referring to first order classical logic. There are many other formal logics, but that is the most commonly used.
Aristotelian logic may be considered a small fragment of first order classical logic with many restrictions. The main ones being:
Aristotelian logic is limited to monadic predicates, so it can express propositions about properties of things but not relations between things.
Aristotelian logic limits propositions to one quantifier, so it can only express very simple propositions.
Aristotelian logic cannot express the logic of propositional connectives, 'and', 'or', 'not', 'if'. The logic of these was developed separately by stoic logicians.
I list some other limitations in my answer to this question.
Aristotelian logic uses different conventions for representing sentences of the form "All ...". For example, in Aristotle's logic, "All S is P" entails "Some S is P" whereas in classical logic it does not.
Aristotle's logic can be translated into a fragment of first order logic. This was demonstrated in the 1970s by John Corcoran and Timothy Smiley. One difference is that Aristotelian logic is decidable, whereas first order classical logic in its full generality is only semidecidable. Neil Tennant has also demonstrated that Aristotelian logic is relevant and intuitionistic and so it is also a fragment of what he calls Core Logic.
Because of its limitations, Aristotelian logic is not suitable for expressing the kinds of propositions that occur within science and mathematics. This is why classical logic is so commonly used: it was developed with scientific and mathematical use in mind. Some commentators on Aristotle maintain that one cannot separate Aristotle's logic from his metaphysics and that he was engaged in a different kind of project from the modern approach to logic. However, Aristotle's logic is not limited to statements of cause and effect as you suggest.