From what I understand, the durability between the two is quite different. The PTFE membranes are used for the filtration of organic solvents where as the PVDF membranes are generally for low protein binding. Furthermore the PTFE membranes typically require a polyethylene support.
When the U.S. and Washington State flags are flown from a cross staff, the U.S. flag flies from the peak and the Washington State flag occupies the position on the right end of the cross staff (the observer's left). Additional Information on Display US Flags.
The flag is worn on the right  shoulder, because, in the military, the place of honor is to a  military member's right.    The full-color U.S. flag cloth replica is worn so that the star  field faces forward, or to the flag's own right.