Rather crudely you might see the differences as being:
A university - students engaged in study, where study is an end in itself.
Developer training - students engaged in study, where being job ready is the end goal.
However. Working in the UK, the job readiness of a university degree is seen as a major indicator of the 'success' of a university course. We have the British Computer Society accrediting courses and universities are ranked on the employment rate of their students. So in reality, there might be no difference at all.