Yes, the Rad Editor in Sitefinity is the same as the one on the demopage but the tools file, which configures the tools, is different.
In order to show all the tools you will need to change the tools file.
Here is an example on how this is done for the GenericContent
new item inside the admin.
1. Be sure to use the external templates
2. Open ~\Admin\ControlTemplates\Generic_Content\ContentNewView.ascx
3. Change the Rad Editor tools file from:
4. Save.(see screen shot)
Hope this helps.
the Telerik team