As stated, lots of options. The single biggest key, other than your own E-state is estimating the other persons E-state. If at the merge they are slow I will almost always hit WEP (if it isn't already on) and do a low-G vertical move. Since they are slow, I am fast, I get up high, see how they responded then act.
If they are also fast I will likely take the same route, getting as much altitude as possible, see what they do and decide if I go over the top or roll over and extend. One note, I have a small world of Fw-190A5s and the rest being shiny targets for my 20mms. This means that in a 190 I will stall fight but under a much more narrow set of circumstances I try and control. If I have estimated their E-state correctly and handle my own, to include flaps, etc I will get them slow and stupid, then drop in for the kill.
One of the biggest tricks is getting a sense for the other guys E-state, fast or slow. That helps you make good decisions.
I am guessing these answers might frustrate you because you wanted to know 'hard or soft G-turn.' Recognize that is the right question, just a few others come up before that one. E-state is part of Situational Awareness, or SA.
My two cents.