the GMT is a extra hour hand,, so you always know what the time is at home,,, the explorer is even cooler as the extra hand is a 24 hour movement as further north you go you dont get 24 hour days so cant always tell if its night time or day time
ive got a GMT thats a cool watch ( though its in the watch shop having the glass repaired,,,,, and will be there till i get rich enough to pay the bill pmsl )
i bought the GMT as it looks like the submariner and was cheeper,, didnt know the difference tbh
as for the watch,,, well it tells the time and every cunt thinks its a fake so easier to wear my seiko kinetic ti