Points of contact with the ground.
Just in case anybody is reading too much into the pictures and unofficial words.
The attitude of the plane makes a difference (pitch and roll) as well as the dangling parts of the plane like gear and engines. Even in the Korean event in Guam it was clear that the first contact was way upstream from where the wreckage sat in the ravine
I'm not content to conclude anything based on what's reported to-date. However I will follow with interest any speculation from herein regarding what might make a difference in the causal chain.