Sorry it's going to take me a bit to remember this forum is here.
I don't actively monitor fuel system restriction/pressure. Instead I have a gauge that I use as a tool to check periodically.
I won't get caught up in all the 2 micron over rating BS, but I will say that I do not care to have the best filter first in line and also don't care to have to do a quick filter change on the road as it means wearing diesel.