Better perfomance in NTW than ETW?

I'm buying NTW soon however I'm wondering if the perfomance is somewhat better, because I got lag every time I set the speed to Ultra Fast in ETW.

Would it be normal that it occurs with the specs I have? (Look at my sig)

Everything is at ultra by the way, including unit size

AA is at 4x and filtering is trilinear

I can only go full speed in smaller battles but my PC isn't that great. Its about the same as Empire after the patch they released in Sept or Oct