I am thinking why do all the other makers put there rear sight so far forward..............

Not all are toward the rear. In one of my old catalogs there is a copy of a order form and on the form it asks the purchaser if they want 1/3 rib or 1/4 rib fitted. Then of course there is a selection of rear sights, but back to the rib spec's, a 1/3 rib would obviously be 1/3 the way down the barrel from the breech where as a 1/4 would indeed be 1/4 of the way from the breech towards the muzzles. I would presume that the one example you have chose to highlight was ordered with a 1/4 rib, thus placing the rear sight closer to the eye, alongating the sighting plane.

All a matter of personal choice I would think, at least while that is still legal in the U.S.A. My perference is for them to be BIG and in the right spot when I am needing them.

I won't bring up where I like a Ghost Ring mounted.................