Yes, you can create Buttons that are same in all aspects. Using the rgExpCSV, rgExpXLS, rgExpPDF CssClasses, you can get the look and feel of Export to CSV, Excel, PDF buttons respectively.
The CommandName such as ExportToCSV, ExportToExcel, ExportToPDF can be given to perform the necessary actions. Please try the above code snippet and let me know if any concern.