What changes the decision?
A full virtual copy can retain breadth without physically duplicating all storage; a subset reduces the working data. Both differ from creating a novel business scenario. Procurement must name the exact products, connectors and deployment topology.
What should your proof of concept show?
Provision one accepted business scenario or refresh from a controlled source snapshot. Verify transformations, relationships, project access and execution evidence. Test a failed job and recovery. Measure storage, setup effort and ongoing operation with your own workload.
These are editorial decision criteria, not measured product rankings. Follow the profiles below for product-specific source evidence.