I have a similar model to the 6111 and had the chance to try both
Imho the 4907 (or 4838 ) , have a bit more presence, because of the "wide" flat bezel", the cylindrical shape of the case and the fat lugs. It is absolutely superb,
The 6111 has a more refined shape, looking thinner from profile, With an inclined bezel, the elegant and sharp "maltese cross" lugs, it loks less massive than the 4907. The biggest problem is to find a good one. I will advise you to share the watch here before buying it.