I just got this larger one to be free to choose whatever lens from my sets to be quickly at hand, ready to change the range of my camera's "eye".
A safe place just because of its sturdy and padded making, granting full protection to the delicate (despite their weight) lenses hanging at your waist from the Arc Belt.
This model lets me store even two compact lenses at a time, like a 50 mm and a wide zoom, just simply putting a simple foam disc to safely separate them, while my most compact tele zooms can be stored with the hood mounted, a nice benefit for a quick "draw and shoot" situation.
And further it looks really good, one more positive feature.
This way I have my most used lenses at hand while shooting, leaving all the rest safe in the Corona 26.
Tamrac, what else?