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.
Imagine that each flag is a person, and they are standing side by side looking at you. The American flag is the one standing on the right of the other. The American flag is always supposed to be displayed holding the position on it's own right. The right side is always a sign of seniority and also precedance.