Although it seems that the RunSavedImportExport method is easier, keep in mind that you have no way to change it at run time. So for example, if you are doing an export and you want to include the date as part of the file name, you can't do that with RunSavedImportExport. You have to use the Transfer... method so you can include a different file name each time you export.
Also, the RunSavedImportExport is more fragile. I just changed the code one of my clients wrote to use the TransferText because he doesn't have any control over the file he is receiving and the maker added two new columns. The TransferText method (if you are importing a .csv file) doesn't fail.
Microsoft Access is a rapid application development (RAD) relational database tool. Access can be used for both desktop and web-based applications, and uses VBA (Visual Basic for Applications) as its coding language.