It is the mark of a fine conductor that s/he treat Mozart and Haydn symphonies with he same reverence as, say, Beethoven or Bruckner. In his last four symphonies Mozart establishes a standard for symphonic writing that later composers, Beethoven included, were to respond to and build on. Mackerras has long been a Mozartian par excellence, although his earlier recordings of these symphonies are not, in this reviewer's opinion, of the best. These new recordings with the SCO certainly are.
Mackerras adopts a modern approach to these works that is informed by 'period instrument' performances, while still allowing the sort of spaciousness one tends to find in the performances of more 'old school' conductors - Bohm and Bernstein, for example, are both worth hearing in this repertoire, but Mackerras has the edge on both; he is somehow that bit more 'Mozartian'. The SCO is outstanding as always, responding stylishly and gracefully to Mackerras's meticulous detail.
I've been looking for some time for a modern instrument recording of these works that can stand repeated listening and I found it in these; in fact, for me, Mackerras offers the most rounded and consistently pleasing account of these great works and I would recommend them whole-heartedly.