Nissin is OEM for Honda so the unit has not been changed if its that.
Use OEM brake pads, you will feel instantly that they bite better. The problem you might be facing is the Poor Bite of the brakes.
You cannot compare it the way you are comparing with a swift.
There is a difference of road grip of each car. You might not feel Civic's ABS activating at the same speed it activates in a Swift.
Also depends what kind of tires you are running. Good quality tires will not activate ABS that often as compared to hard/poor quality tires.