I love it when people pull random images off the internet. If it isn't random and you are using or have used the plug on the right in your 3.5 Ecoboost, you are using the wrong one.
LTR7BHX is the part number from NGK most people that know these motors are recommending. It is one heat range cooler, and comes gapped at .031. If you want the same heat range as stock, use LTR6BHX also gapped at .031. If you are tuned you should gap at .028, I even do .028 when stock in the Ecoboosts that are factory gapped at .031. You will notice a smoother idle.
Just because a plug is made by the same manufacturer does not mean it is the same quality. OEM Ford plugs have been proven not to last even close to their recommended 100K interval. If you are towing or doing a lot of city driving you will notice a drop in MPG around 30K. Changing the plugs will gain most of it back, and if you go to better plugs like the part numbers mentioned above, you might even see an improvement. Even with the NGK Ruthenium plugs I would not recommend a 100K interval. EcoBoosts are hard on plugs, as most Turbo motors are because of added cylinder pressure and heat.