11/16" tie rods ends have double the bending resistance of 9/16" tie rod ends according to Andy Finkbeiner. It a great upgrade, especially if you are using wider front tires!!!
That's neat an all, but what I'm telling you is that I have over 70k miles of street driving between my Challenger and my Duster with 9/16" tie rods using solid adjusting sleeves with 275mm wide front tires with modern tire compounds, and I have yet to damage a set of tie rod ends.
The 11/16" tie rod ends are stronger for sure, but you're biggest gains in terms of flex in the steering system are from ditching the split sleeve adjusting tubes.