If you compare the entire suspension systems used with each of these options listed, you come up with a difference of approx 2.65oz between lightest and heaviest. (depending on exact components used, of course)
For me, that 2.65oz difference is not worth losing sleep over. I'd rather limit my worrying to bigger things.
I use many of these different options when I'm out playing with different setups.
When I'm out hiking and not fiddling with my gear, I choose cinch buckles and straps.
Simple setup, fast adjustment, easy teardown.