The "standard" English PSU has 2A output, while the German one has a lower output. Zozo said it on an old thread but I can't find it.
I think it is better to feed the EP+EXDOS with the original PSU(probably you will have enough with 1,3A), and the floppy drives with the additional PSU only(with +5v and +12v outputs you can connect older 5-1/4 drives).