Web user controls:1. Easier to create 2. Limited support for consumers who use a visual design tool 3. A separate copy of the control is required in each application 4. Cannot be added to the Toolbox in Visual Studio 5. Good for static layout Web Custom Controls:1. Harder to create2. Full visual design tool support for consumers3. Only a single copy of the control is required, in the global assembly cache4. Can be added to the Toolbox in Visual Studio5. Good for dynamic layout