Widegrip with an underhand grip would be more lats, but if it's overhand then it's going to hit more upper back. For the chest supported row, it depends where the handles are positioned.
You see, in the photo you posted above, it's only the plate that is going towards his chest, which is totally normal if you watched my T-Bar row video I released today. But the actual handles are down below his chest. So if the handles have you pulling to your chest/upper body, it will be upper back, but if the handles have you pulling below your chest closer to your stomach, that will tend to be more lats. It's not just where the plate is going.