ZT 0400 blade thickness is .155"
ZT 0780 blade thickness is .121"
Unless you have the 0300 in your running shorts or dress slacks compared to 0770CF.
Like most things it's conditional and subjective.
True, and preferences are going to vary from person to person. That said, I've tried carrying both a 0566 and PM2 in slacks. The PM2 is certainly lighter weight, but it's thicker and has a larger footprint. As such, it was actually more obstructive in pocket than the 0566.