You didn't say gameplay in your original post. Seemed like you were comparing them in a more general way.
As far as following markers, etc, those are superficial comparisons at best considering how many games have those things in common.
I mainly just enjoy pointing out that while lots of Codexers shit all over Assassin's Creed Origins and games like this, The Witcher 3 is the 15th best RPG
of all time according to our poll. If the argument is that Witcher 3 has better story and writing, then yes of course it does, but the gameplay is pretty much the same. Therefore Codex is either full of story fags (hmmm I wonder what our number one game is?) or they enjoy open world marker hunts as much as the Playstation bros do.
Either way, Horizon isn't something that should be dismissed on spec because "it's like Assassin's Creed."