You don't need a complex automation script that syncs every single comment. That usually breaks and creates more noise. Instead, follow the "Split-Brain" method:

1. Notion is for the "What" and "Why": Product Requirements Documents (PRDs), Brand Assets, Meeting Minutes, and Long-term Vision.
2. Jira is for the "How" and "When": Tickets, Sprints, Kanban boards, and QA testing.
3. The Golden Link: Every Jira ticket should have a link to the Notion PRD in its description. Every Notion project page should have a synced Jira search block showing the current status of that project’s tickets.

Tool Comparison: At a Glance