G5S plus. Moto M is like 2 years old and has MTK processor in it. I doubt it will get any updates in future. You will be stuck on same OS till you upgrade to a new phone.
I own a Moto M. don't even think about buying it. camera is like a cheap china phone quality. All blurry. And i upgraded to Android 7.0, but in future there will be no upgrades.
I even published my review in Flipkart. total waste.