Google's phone holds up fine against the huge sensor and superior OIS suspension of the 1020. It is, naturally, not as detailed, but the pics from it seem to be as good as the ones from the LG G2, which we already pegged in our camera comparisons as one of the best Android cameras out there. Regardless, the verdict in this quick comparison unsurprisingly favors the 1020...
Source: http://www.phonearena.com/news/Nexus-5-vs-Nokia-Lumia-1020-low-light-camera-comparison_id49015
Source: http://www.phonearena.com/news/Nexus-5-vs-Nokia-Lumia-1020-low-light-camera-comparison_id49015