Techne and Contemplation

According to Aristotle, Techne and Contemplation is each a Knowledge of Universals, but that the products of Techne are variable constitutes its inferiority to the latter.  Thus, it is unclear if it is insofar as it is productive, or insofar as its products are variable, that it is inferior.  Now, the Metaphysics does not quite clarify his judgment.  For, his definition of Contemplation as Knowledge of "first causes" is that of what the First Cause is--the Unmoved Mover.  But that Knowledge is distinct from Knowledge of Causality itself, a Knowledge that seems difficult to conceive without entailing Productivity.  So, the superiority of Contemplation might consist instead in the non-variability of the products of the First Cause, or, in other words, that the object of Contemplation, unlike that of Techne, is Necessary Causality.  But, then, he is arguing that the thought of the Causality of some other entity is superior to first-hand acquaintace with his own.  So, to accommodate that strong objection, Aristotle would seem to need to shift focus to an example of first-hand Knowledge of Necessary productivity, which, in his system can be only Syllogistic reasonong, i. e. the production of Consequences from Premises, which he discusses in On the Soul. But, how that process, i. e. Logic, is not Techne, i. e. a Knowledge of how to generate one proposition from another, remains unclear.