Custom Workflow in SharePoint (Sharepoint Designer Vs Visual Studio)

Using SharePoint Designer Using Visual Studio Can write only sequential workflows. Can write both sequential and state machine workflows. Automatic deployment against the specific list or library against which workflow is being designed. Can be deployed as a feature. Logic is defined declaratively using Steps which comprises of Conditions and Actions Logic could be defined through custom code written using C# or VB.NET. Workflows could be associated to a specific list or library. Workflow can be authored as Template which once deployed could be associated with any list or library. Workflow modifications not possible. Workflow modifications are possible using Modification forms built using ASP.NET or InfoPath form. Workflow markup, rules all are stored as a document library on the site. Workflows are compiled as an .NET assembly. Can’t be debugged. Debugging is possible using Visual Studio.