Refreshing Your Media lasts for a really long time

Is there any difference, in terms of destruction of the flash memory, between deleting a file using the menu (I usually delete every single file after listening) and connecting the clip to the computer and delete it using Windows?.. in other words, is it advisable to delete individual files (4 or 5 each day) using the menu, or it is better to wait and delete all files together only once a week (for example) when connected to the computer?