thats a great question anton. i have had both now..ROO from josh and this being my first mbk. i think without the hornback the only big difference is the date mag being on the dial. the fit and finish is better, but not that much better. so i guess if somebody is really stuck on the date mag issue, then it is worth it. But, for me, the hornback was the deal closer. totally transforms the watch...the pics do it no justice.