Need help in selecting from these two power supplies - what is the practical difference?? Reason to select one over the other - thanks - Marty
EVGA SuperNOVA 1600 P2, 80+ PLATINUM 1600W, Fully Modular, EVGA ECO Mode, 10 Year Warranty, Includes FREE Power On Self Tester Power Supply 220-P2-1600-X1 
EVGA SuperNOVA 1600 P+, 80+ PLATINUM 1600W, Fully Modular, 10 Year Warranty, Includes FREE Power On Self Tester, Power Supply 220-PP-1600-X1

The only real difference I see is the length of the unit.  The P2 is 20mm longer.
 
EDIT: The fan sizes are different also. The P2 has a 140mm, the P+ has a 135mm.