The overview of the differences between the 2 systems can be found here: https://info.corenet.gov.sg/overview/corenet-x-submission-portal
New features that are designed to be more user-centric include dashboards and timelines displaying pending actions and monitoring submission progress, TOP/CSC dashboard showing outstanding clearances working towards TOP/CSC, pre-submission plan fee auto calculation, receipt auto-generation, send a link to an external party through “ask someone to pay” for plan fee payment.