Comprehensive and Detailed 150-300 words Explanation (paraphrased from Scrum & AgilePM practice):
When multiple teams build a single product within one project, effective backlog ownership and value alignment are critical. Scrum practice-and AgilePM when combined with Scrum-supports one Product Owner for the product, even when several teams deliver increments in parallel. A single Product Owner preserves a single ordered Product Backlog, unified priorities, and consistent acceptance criteria, minimizing conflicts and dependency churn. Each team may have its own Scrum Master to optimize facilitation and impediment removal locally, but the essential management mechanism for cross-team coherence is shared product ownership (one Product Owner) paired with lightweight cross-team planning and frequent integration. Splitting into two separate projects (with separate roles) for one product typically fragments value flow and complicates governance. Likewise, mandating different Business Visionaries per team dilutes accountability for the product outcome. Hence, the preferred and most effective approach is that both teams share the same Product Owner to maintain a single value and prioritization voice.