If you take a better look at that one you will notice that the initial settler does indeed get to ignore terrain cost. That being said, I already have issues with the AI spamming my area with settlers, I'd rather they didn't move faster. But the best part of mods is to give a varity of flavors so everyone can pick their favorite.

I was actually up to make that kind of idea myself, nice to know someone else already did it.
But if you give a better look you will notice that both are still very different, since one applies only 4 moves and terrain cost ignore and to ALL settlers, rather than 10 moves (and no terrain cost ignore promotion) to only the starting settler.

How is this mod better then
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=96695370