Answer to your question in topic title:
It is difficult to give a precise answer to what you would like but each has its advantages and disadvantages. This is where pilot training is apparent. If you can properly use your device against opponent's weaknesses then you will not be in a dilemma who is better.
It depends on many factors and the most important is aspect of the target, your/target speed, altitude, range... Mostly, best results are within 8km max (the best is 6-8km).
See the answer for Su-27S "Flanker-B" ;)