I would say this dichotomy doesn't quite capture what's being discussed. To my mind, detail focused can still result in an ugly hack of a solution, merely with all corner cases covered.
I think one possible phrase closer to the heart of things would be "aesthetically focused" as well as detail focused -- they care not only about the details of the functionality, but about the "technical beauty" of their solution.
I think one possible phrase closer to the heart of things would be "aesthetically focused" as well as detail focused -- they care not only about the details of the functionality, but about the "technical beauty" of their solution.