The position of the CG will vary with fuel load etc. As for the 'centre of lift', do you mean the centre of pressure (which varies with angle of attack with a cambered airfoil), or the aerodynamic centre? The two terms aren't interchangeable.
In any case, if you want the 'exact location', you'd have to specify in relation to what - I suspect you would most likely want it as a percentage of mean aerodynamic chord, but even this is a little hard to define precisely.
Broadly speaking, the further forward the CG is relative to the aerodynamic centre, the more longitudinally statically stable, and less manoeuvrable a plane becomes, but this isn't enough on its own to make any definitive statements about the relative performance of aircraft.
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