ODBC and OLEDB are two types of drivers. For some data sources there is no OLEDB driver available, but there is an ODBC driver. In that case you have no choice and need to use the ODBC driver. If both types of driver are available for a data source then using the OLEDB driver is easier. You can find more information if you search the internet. There are a lot of articles about OLEDB versus ODBC.