Sony 6400 just announced and features excellent core specs. We have also done a specification comparison review between the Sony A6400 vs Sony A6500. Sony A6500 features same sensor, so we probably won’t see any major difference between the two camera in terms of image quality.
Sony A6400 Sample Images
see high resolution official sample images here
Also look at
Sample Images at DPreview Website
But Sony A6400 camera from B&H | AMazon.com