Webpart vs. Visual Webpart in SharePoint 2010

Using Visual Web Parts vs. Traditional Web Parts in SharePoint 2010

 Learn about the advantages of using Visual Web Parts and traditional Web Parts in SharePoint 

• Differences between a Web User Control and a Web Part
• Differences between Visual Web Parts and Code-Only Web Parts
• Creating a Code-Only Web Part and a Visual Web Part
• Conclusion
• Additional Resources
  
  http://msdn.microsoft.com/en-us/library/hh857549.aspx