[quotemsg=11070501,0,388413]so if the VP-F offers the same as the VP-P, what is the difference?[/quotemsg]
The VP-P only supports 200 - 240VAC input whereas the VP-F supports 100 VAC - 240VAC.
The VP-P has much stronger maximum combined +12V rails than the VP-F. On the 550 Watt model the VP550P has 45 Amps whereas the VP550F has 37 Amps.