The device called AppleTV3,2 runs the same firmware build (10B144b) as the AppleTV3,1.
iH8Sn0w commented on the new build saying:
New Apple TV3,2 is powering a s5l8947x with a board config of "j33iap". Looks like a minor update of the Apple TV 3. I Wonder why though...
It's unclear if Apple has already begun selling this device in stores or if it will be released shortly.