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 of the United States of America, when it is displayed with another flag against a wall from crossed staffs, should be on the right, the flag's own right [that means the viewer's left], and its staff should be in front of the staff of the other flag.