What Delphi adds to Visual Basic:

1. Professional quality version available through educational license
2. Color Buttons
3. Option to keep components fixed in place during development
4. More controls, better method of arrangement of the component palette
5. Form, project, and menu templates and form and project experts
6. Object inspector has a stay on top setting
7. General functionality of right-click speed menu
8. Better code editor functionality, including font selection and sizing
9. Option to save window placement of existing project
10. Option to start project with a default project layout
11. Option to start forms with a default form layout
12. The value of a changed default name property is reflected in the caption if the caption is the same value as the name
13. Automatic creation of separate form and a code files rather than putting code in form files as Visual Basic does
14. Runtime form centering options
15. Design time component alignment options
16. Delphi objects encapsulate Windows behaviors, enabling you to interact with the object instead of directly with Windows. I think that that is a quote from the User's Guide.
17. You can reuse a form by making it into a component that can be installed onto the component palette. Another quote.
18. Better input option
19. Easier access to stay on top attributes
20. Drag and Drop menu editing
21. Complete information and capability is provided for writing Delphi components.
22. Flyby help hints
23. Better positioning of quickly added components
24. Better settings for items placed within forms
25. Providing a list of open documents as part of the Window menu in an MDI application requires only that you set a property.
26. Arranging icons and cascading or tiling windows for MDI applications is very easy.
27. The grid component allows individual items within the grid to be edited.