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.
If you are looking at it from the street to my house which side should the flag and flag pole be on? There is no special rule about this. As long as the staff is securely mounted and the flag is clear of the ground, tree branches, etc., it can be displayed anywhere that looks good. When the US flag is displayed along with one or more other flags, it should be to its own right (the viewer's left) of the others, and should be at the same height or higher than the others.