If your machine is in good shape mechanically, it should always print exactly the same way if the settings are the same. Sure, there is some variation because we all know 3d printers have a bit of "attitude" but, if the settings are the same, the model is the same and the machine is mechanically 100%, then you should be able to repeat prints and get exact copies time after time.
Don't forget enviromental factors: humidity, & temperature also effect printing.

But my answer would be: if abs is printing perfectly - use abs :-)