What is the difference between the ExpreS2 platform and the baculovirus system?

The baculovirus system is a lytic system (the cells lyse upon infection with a recombinant Baculovirus containing the gene of interest) while the S2 platform is stable insect cell expression. Insect cells are transfected with an expression vector, followed by selection and screening of polyclonal or monoclonal high-producers.