Difference between Power Center and Power Mart?

PowerMart was reduced functionality and reduced price versus PowerCenter. Since the introduction of PowerCenter 7 PowerMart is no longer sold. Instead PowerCenter is sold as a base product with extra funtionality such as partitioning, team-based development, etc. sold as options.

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Power center receive all product functionality including ability to multiple register servers and metadata across the repository and partition data.

One repository multiple informatica servers. Power mart received all features except multiple register servers and partition data.