EU is probably closer to you (location and ping wise), which is why you're not experiencing any lag spikes.
I use task manager to set Engine.exe to low priority, for me it stops the crashing and lag but lately it makes CA lag spike every 8 seconds, never lag spiked before in the past when i set it to low but now it is and if i don't set it to low i crash.
I also play CA eu crashing is also there but i can set the priority to low without lag spiking like i could of done on NA.
idk if this is the reason but when i updated the firmware of my router it started lag spiking when i set the priority to low, but it stopped now it started it again and this time its not stopping.
EU is probably closer to you (location and ping wise), which is why you're not experiencing any lag spikes.
No I do not make game hacks anymore, please stop asking.