i never saw any point in those "monorail" bridge things, except that each one is firmly screwed into the body and won't move around. if it were a row of saddles firmly locked to a metal bridgeplate i don't see how it would be any different. (the technobabble is about reducing string "crosstalk", but how often do you play one string while letting the others ring freely?)
as for the fender saddles, it's the difference between this (note the separated G saddle; push it back in place and the string will just force it apart again):
and this (string-through, but the principle of multi-grooved saddles and a wider string spread pulling the saddles together retains):
as for the fender saddles, it's the difference between this (note the separated G saddle; push it back in place and the string will just force it apart again):
and this (string-through, but the principle of multi-grooved saddles and a wider string spread pulling the saddles together retains):