Magento v Other Platforms

Hi,

I am a MBA student doing a research project on B2B eCommerce platforms at a mid-enterprise scale. Specifically, I am looking at various platforms and their ability to host a marketplace with >1M SKUs and various sellers on the marketplace. I have been trying to compare the functionalities of Magento to others and would love for the community’s insight. I have a list of categories for comparing the solutions and would appreciate any detail or a rating of High, Medium, Low, No support.

1. Primary User bases & Scenarios (SSO/New users/New locations)
2. Integrated Product & Service Requisitioning (Split shipments/Ad hoc shipping/Inventory Visibilty)
3. Simplified Sourcing (RFx, Auction, BOM capabilities)
4. Integrated Supplier Portal (Onboarding/Registration)
5. Flexible Analytics & Reporting (Ad hoc & out of the box)
6. Configurable integration across ERPs/WIMS systems
7. Integrated Catalogs: Federated Search & Multi-SKU (Punchout/Hosted Catalogs/Non-Catalog Reqs)
8. Issue Tracking and Supplier Scorecards
9. Flexible Billing and Payment
10. Notification and Message Capability
11. Collaboration and Online Support
12. Avg Go-Live Time
13. Differentiator
14. Pricing Model
15. International

Thanks for any and all insight!!