Just my personal opinion on this topic.
I don't think OW is really "stealing" any ideas. I mean they got to stick with their theme of guns and bows, mounts and farms, etc. It's the old west. b: Aha. Plus a lot of ideas come from other ideas and are usually mixed around until a new formula is given. Not saying all ideas are like this doe.

Hell there's similarities in all the servers. There are differences and similarities in both the servers of course, they both have mining but they each do mining in a different way. I mean the ideas of bug catching and mining and such, deals with doing the jobs in a different way. (Catching the bugs in a jar, mining actual minerals, etc.)

The guns are slower and less whatever for a reason. To keep the game more balanced, thank goodness for that. Food has also changed, so that you can't spam healing yourself. Whereas iEra has increased in such a population that the demand was to get the best gun you could get, and spam the crap out of everything. Everywhere you go there's just bullet spam and there really isn't much skill you can find on here anymore. iEra, it's like, how the hell do you even make money anymore. Lol.

Well here's my list of Pros and Cons for OW:
Pros:
-Balanced guns
-Easy money
-No spam of food
-Easier to base, but still challenging to hold

Cons:
-No 15 seconds of chasing someone into a building and being able to kill them within that time limit
-Not many people online to PK
-Not many people to spar with

Feel free to add to the list. These were just a few from the top of my mind.