You haven't did your research on the other servers (German and China) right? Cause you would know would been getting the same content as Germany and China.

We get the major content like treasures, ninjas, new in-game events like bond arena, rescue the jin, etc. , and some events that appear in hot topics. This is what people look at majority of the time. Small stuff like rewards in instances, prices on ninjas, and ninjas in shop will be different depending on the different servers. It depends if Oasis is intentionally delaying when a certain ninja comes to shops. Remember GNW Sakura? Once people saw her in Germany, people waited for her to show up in our server. It was longer compared to when Germany got it but we did get her and eventually got her in shops. Plus someone posted the 4.0 update for Germany in the forums recently and guess what China has those same updates. When you want to compare servers, look at the major content not the small stuff.