The June Popular Photography issue reviews the GM1, which it says has the same sensor as the GX7. Their evaluation of noise from the GM7 seems remarkably different than the review they did in the November 2013 issue of the GX7. For the GM1, noise remains "moderate" 2.4 through ISO 12,800, and only becomes "unacceptable" at ISO 25,600. For the GX7, noise remains "moderate" 2.8 through ISO 800, and becomes "unacceptable" 4.0 at ISO 1,600. The article seems to attribute improved performance to the Silkypix software by writing: "Usually we end up talking about how the Silkypix RAW conversion software that Panasonic includes with its cameras doesn't vary the amount of noise reduction as the ISO changes. But that's no longer the case. The new version of this software applies a different amount of noise reduction for each ISO and yielded very favorable results." Do these rather stunning changes in performance seem attributable solely to the software change? Does that mean their initial test would look quite different with Lightroom? The results for the GM1 are beyond the Olympus EM1 performance as well, which leaves "moderate" 2.6 at ISO 3200 and becomes "unacceptable" 3.3 at 6400 (and "unacceptable" 4.4 by 12,800).