PhpStorm & Web Storm 2.0 (Q4 2010)  - PHP (PhpStorm only!)
- "Any framework" support mechanism via ability to supply extensive metadata about autoload & magic infrastructure
 - Zend framework support (zendtool, generators, specific navigations)
 - Zend debugger support
 - Refactoring: Smart introduce field
/ constant , inline variable , safe delete . - New code inspections
- Control flow / Unreachable statement
 - Control flow / Wrong catch clauses order
 - Probable bug / Wrong string concatenation operator
 - Type compatibility / Invalid foreach() argument type

- full fledged PHP namespace support
 - Structure view sorting and filtering

- CSS
- LESS editor support
compilation support  - SASS 3 support
compilation support 
- Language Injection
- New editor of injected fragments

- Version control support
- New DVCS UI (Git, etc) with easy multiple repository branch switching, built-in log views and integrated cherrypicking, etc.
 - Softwrap in code editor
, spellchecking an completion in all controls (i.e. commit dialog)  - Mercurial support

- Other
- Streamlined UI: more compact layout, better indication, better blending into OS style
 - RelaxNG support

PhpStorm & Web Storm 1.0 (Q2 2010)  - HTML/XHTML/XML/XSLT/XPATH

- JavaScript (laguage standard 1.6 with partial 1.7)
- Editing (syntax, code completion, code inspections, etc.)
 - Refactoring
 - Go to symbol, declaration
 - Structure view
 - Advanced support for frameworks (JSON, DoJo, JSDoc, jQuery, Prototype)
(check FAQ on other framework support)
- CSS

- PHP (PhpStorm only!)
- full 5.3 syntax support
 - scope-aware code completion
 - PHP refactorings: rename, introduce variable.
- advanced code inspections (visibility, type checking, etc)
 - Language injection - SQL in PHP
 - support for any type of outer language - HTML, CSS, XML, SQL, etc..
 - Frameworks & libs: Smarty
(check FAQ on other framework support)
- SQL (PhpStorm only!)
- syntax and error highlighting
 - keywords, table and column names completion
 - SQL Console
 - generic SQL (SQL-92)
 - MySQL
 - SQLite

- Spell Checker

- FTP/SFTP sync
 - XSLT
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