Urgot E Charge Fail

I've recently started playing Urgot from the rework a while back. His E is a "charge". I can't find what the difference between a charge and a dash is. The best I can't figure is they are the same but a charge gives a status effect like Urgots flip where LeBlanc's dash just does damage. If this is correct then why is it that Urgot can not go through walls even when his skill shot meter will clear the wall. I went in to the practice map and tested this on the smallest walls on the map. If a charge and dash are not differentiated as I stated above then what is the difference? If a charge can not pass through wall then why can Malphites R, which is a "charge", go threw walls. In some places it can go threw 2 walls in one cast. The only other 2 champs I could find with a "charge" is Ornn and Hecarim. While Ornn can not charge through walls, he can destroy opponent made terrain/walls (as of last year, unless this changed). Hecarim's Devastating Charge (E) and Onslaught of Shadows (R) are both a "charge" and both go through walls. So I ask you, RIOT, why can Urgot not charge through walls like the others? If you don't have a good reason then I request you to allow it. I also request that you increase the range on it a tad. With the countless numbers or champs with dash, leap, lunge, rush, and even roll (Ekko) that all go through wall why can charge not og through walls when it is not designed to interact with the terrain as in Ornn's case. Thanks

TLDR: Urgot E should go threw wall like all the other charges but Ornn.