Currency uses whatever format is defined in your PC's international settings
in control panel. Euro uses Euro format even if your PC is not configured to
use Euro format normally. So if your PC is configured to use Euro format,
and you apply Currency format to one field and Euro format to another, you
won't see any difference between those two fields. But if your PC is
configured to use, say, US or UK settings, then if you apply Currency format
you will see dollar signs or pound sterling signs, respectively, but if you
apply Euro format you will see the Euro symbol, even if that is not the
usual currency symbol on that PC.