We know that there are three different versions of SharePoint 2010. They are:
1. SharePoint Foundation
2. SharePoint 2010 Standard
3. SharePoint 2010 Enterprise
There are lot of articles which helps to identify the features at high level which are available in these different versions. Below comparison can help to identify the specific functionality which are available in these various versions. Hope this helps you to identify the correct version of SharePoint 2010 product.
1. SharePoint 2010 Foundation:
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Accessibility
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Blogs
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Browser-based Customizations
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Business Connectivity Services
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Business Data Connectivity Service
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Claims-Based Authentication
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Client Object Model (OM)
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Configuration Wizards
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Connections to Microsoft Office Clients
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Connections to Office Communication Server and Exchange
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Cross-Browser Support
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Developer Dashboard
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Discussions
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Event Receivers
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External Data Column
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External Lists
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High-Availability Architecture
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Improved Backup and Restore
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Improved Setup and Configuration
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Language Integrated Query (LINQ) for SharePoint
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Large List Scalability and Management
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Managed Accounts
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Mobile Connectivity
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Multilingual User Interface
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Multi-Tenancy
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Out-of-the-Box Web Parts
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Patch Management
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Permissions Management
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Photos and Presence
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Quota Templates
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Read-Only Database Support
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Remote Blob Storage (SQL Feature)
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REST and ATOM Data Feeds
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Ribbon and Dialog Framework
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Sandboxed Solutions
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SharePoint Designer
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SharePoint Health Analyzer
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SharePoint Lists
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SharePoint Ribbon
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SharePoint Service Architecture
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SharePoint Timer Jobs
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SharePoint Workspace
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Silverlight Web Part
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Site Search
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Solution Packages
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Streamlined Central Administration
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Support for Office Web Apps
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Unattached Content Database Recovery
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Usage Reporting and Logging
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Visual Studio 2010 SharePoint Developer Tools
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Visual Upgrade
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Web Parts
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Wikis
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Windows 7 Support
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Windows PowerShell Support
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Workflow
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Workflow Models
2. SharePoint 2010 Standard Version: All the above from the Foundation version with addition to the following:
• Ask Me About
• Audience Targeting
• Basic Sorting
• Best Bets
• Business Connectivity Services Profile Page
• Click Through Relevancy
• Colleague Suggestions
• Colleagues Network
• Compliance Everywhere
• Content Organizer
• Document Sets
• Duplicate Detection
• Enterprise Scale Search
• Enterprise Wikis
• Federated Search
• Improved Governance
• Keyword Suggestions
• Managed Metadata Service
• Memberships
• Metadata-driven Navigation
• Metadata-driven Refinement
• Mobile Search Experience
• Multistage Disposition
• My Content
• My Newsfeed
• My Profile
• Note Board
• Organization Browser
• People and Expertise Search
• Phonetic and Nickname Search
• Query Suggestions, "Did You Mean?", and Related Queries
• Ratings
• Recent Activities
• Recently Authored Content
• Relevancy Tuning
• Rich Media Management
• Search Scopes
• Secure Store Service
• Shared Content Types
• SharePoint 2010 Search Connector Framework
• Status Updates
• Tag Clouds
• Tag Profiles
• Tags
• Tags and Notes Tool
• Unique Document IDs
• Web Analytics
• Windows 7 Search
• Word Automation Services
• Workflow Templates
3. SharePoint 2010 Enterprise Version: All the above from the Standard version with addition to the following:
• Access Services
• Advanced Content Processing
• Advanced Sorting
• Business Data Integration with the Office Client
• Business Data Web Parts
• Business Intelligence Center
• Calculated KPIs
• Chart Web Parts
• Contextual Search
• Dashboards
• Data Connection Library
• Decomposition Tree
• Deep Refinement
• Excel Services
• Excel Services and PowerPivot for SharePoint
• Extensible Search Platform
• Extreme Scale Search
• InfoPath Forms Services
• PerformancePoint Services
• Rich Web Indexing
• Similar Results
• Thumbnails and Previews
• Tunable Relevance with Multiple Rank Profiles
• Visio Services
• Visual Best Bets