Christophe,
I think of the 5127 as representing a minimalist approach to design, softened by the sensuous curve of the crown guards. I find it very appealing. In contrast, the 5053, with a fancy font, Brequet hands, and slim, straight lugs, is a watch I wouldn't even consider, as none of these elements attracts me in the least., though I see the advantage of having some conrast between the hands and the dial.
Which aesthetic do you prefer?
Park