Yeah they are two different effects. Theres motion blur on individual objects that you want (as human eyes see/have) then there is full screen motion blur that

Yeah they are two different effects. Theres motion blur on individual objects that you want (as human eyes see/have) then there is full screen motion blur that is due to the display technology (lcd,oled etc) that you dont want (as human eyes dont see/have). CRTs dont have this motion blur as the screen is blank most of the time - see slo mo guys on youtube for crt displays.