I believe these tables will help you pick which Windows 7 product edition makes the most sense for you, based on your needs and wants. Let's dive right in.

Note: This set of tables has been updated for the final, shipping versions of Windows 7. Unlike similar comparisons, these tables were generated using not by simply observering each product edition, but also by using Microsoft's internal reporting mechanisms to determine exactly which features are, in fact, available in each version. For this reason, I can reasonably state that this is the most complete and accurate list of Windows 7 features anywhere. That said, I'm still human and could have made mistakes transcribing the information. If you see anything wrong or missing, or would like to see a certain feature added, please contact me.

Finding what you need


Availability


Home BasicStarterHome PremiumProfessionalEnterprise & Ultimate
Retail packagingYesYesUlt. only
Can purchase electronicallyYesYesUlt. only
Pricing: Full version$199.99$299.99$319.99 (Ult)
Pricing: Upgrade version$119.99$199.99$219.99 (Ult.)
Bundled with new PCs in major marketsYesYesYesUlt. only
Windows Anytime Upgrade(WAU)YesYesYesYes
WAU pricing/To Home Premium$79.99$79.99
WAU pricing/To Professional$114.99$89.99
WAU pricing/To Ultimate$164.99$164.99$139.99$129.99
Virtualization rights (Can be installed in a virtual environment)YesYesYes

User interface features


Home BasicStarterHome PremiumProfessionalEnterprise & Ultimate
Windows Basic UIYesYesYesYesYes
Windows Standard UIYesYesYesYes
Windows Aero UI ("Glass")YesYesYes
Aero PeekYesYesYes
Aero SnapsYesYesYesYesYes
Aero ShakeYesYesYes
Aero BackgroundYesYesYes
LibrariesYesYesYesYesYes
Windows FlipYesYesYesYesYes
Windows Flip 3DYesYesYes
Live Taskbar PreviewsYesYesYesYes
Live Preview (Explorer)YesYesYes
Jump ListsYesYesYesYesYes
Windows SearchYesYesYesYesYes


Security features


Home BasicStarterHome PremiumProfessionalEnterprise & Ultimate
More granular UACYesYesYesYesYes
Action CenterYesYesYesYesYes
Windows DefenderYesYesYesYesYes
Windows FirewallYesYesYesYesYes
IE 8 Protected Mode and DEP supportYesYesYesYesYes
Windows Update (can access Microsoft Update)YesYesYesYesYes
Fast User SwitchingYesYesYesYes
Parental ControlsYesYesYesYesYes

Performance features


Home BasicStarterHome PremiumProfessionalEnterprise & Ultimate
Windows ReadyDriveYesYesYesYesYes
Windows ReadyBoostYesYesYesYesYes
SuperFetchYesYesYesYesYes
64-bit processor supportNoNoYesYesYes
Physical processor support11122
Processor core supportUnlimitedUnlimitedUnlimitedUnlimitedUnlimited
Max RAM (32-bit)4 GB4 GB4 GB4 GB4 GB
Max RAM (64-bit)n/an/a16 GB192 GB192 GB

Reliability features


Home BasicStarterHome PremiumProfessionalEnterprise & Ultimate
Windows BackupYesYesYesYesYes
System imageYesYesYesYesYes
Problem Steps RecorderYesYesYesYesYes
Backup to networkYesYes
Encrypting File System (EFS)YesYes
BitLockerYes
BitLocker To GoYes
Automatic hard disk defragmentationYesYesYesYesYes
Previous VersionsYesYesYesYesYes
Create and attach (mount) VHDYesYesYesYesYes

Bundled applications


Home BasicStarterHome PremiumProfessionalEnterprise & Ultimate
Internet Explorer 8YesYesYesYesYes
Windows Gadgets and GalleryYesYesYesYesYes
Games Explorer with basic games (FreeCell, Hearts, Minesweeper, Purble Palace, Solitaire, Spider Solitaire)YesYesYesYesYes
Premium games (Internet Backgammon, Internet Checkers, Internet Spades, Mahjong Titans)YesYesYes
CalculatorYesYesYesYesYes
PaintYesYesYesYesYes
Snipping ToolYesYesYes
Sticky NotesYesYesYes
Windows JournalYesYesYes
Windows Fax and ScanYesYesYesYesYes
Windows PowerShell and ISEYesYesYesYesYes
WordPadYesYesYesYesYes
XPS ViewerYesYesYesYesYes

Digital media and devices


Home BasicStarterHome PremiumProfessionalEnterprise & Ultimate
Windows Photo ViewerYesYesYesYesYes
Basic photo slide showsYesYesYesYesYes
Windows Media Player 12 with Play ToYesYesYesYesYes
Windows Media Player Remote Media ExperienceYesYesYes
MPEG-2 decodingYesYesYes
Dolby Digital compatibilityYesYesYes
AAC and H.264 decodingYesYesYesYesYes
DVD playbackYesYesYes
Can install MPEG-2 (DVD playback) add-inYesYesn/an/an/a
Windows Media CenterYesYesYes
Number of TV tuners supported4 of each type (analog, digital, etc.)4 of each type (analog, digital, etc.)4 of each type (analog, digital, etc.)
Windows DVD MakerYesYesYes
Device StageYesYesYesYesYes
Sync CenterYesYesYesYesYes

Networking features


Home BasicStarterHome PremiumProfessionalEnterprise & Ultimate
SMB connections2020202020
Network and Sharing CenterYesYesYesYesYes
HomeGroup sharingJoin onlyJoin onlyYesYesYes
Ad-hoc network create and joinYesYes, but accessible only via Start Menu SearchYesYesYes
Improved power managementYesYesYesYesYes
Connect to a ProjectorYesYesYesYesYes
Remote DesktopYesYesYesYesYes
Remote Desktop HostYesYes
IIS Web ServerYesYesYes
RSS supportYesYesYesYesYes
Internet Connection SharingYesYesYesYes
Network BridgeYesYesYesYes
Offline filesYesYes

Mobility features


Home BasicStarterHome PremiumProfessionalEnterprise & Ultimate
Windows Mobility CenterYes (No presentation mode)Yes (No presentation mode)YesYes
Windows Sideshow (Auxilliary display)YesYesYes
Sync CenterYesYesYesYesYes
Tablet PC functionalityYesYesYes
Multi-Touch supportYesYesYes

Enterprise features


Home BasicStarterHome PremiumProfessionalEnterprise & Ultimate
Domain join (Windows Server)YesYes
XP Mode licensedYesYes
AppLockerYes
Boot from VHDYes
BranchCacheYes
DirectAccessYes
Federated Search (Enterprise Search Scopes)Yes
Multilingual User Interface (MUI) Language PacksYes
Location-aware printingYesYes
Subsystem for UNIX-based ApplicationsYes