I already talked on binding energy.
And the Q-value is the mass different between nuclear reaction. In same case binding energy is same as the Q-value.
Q-value is :
By energy conservation, it can be rewritten by kinetic energy.
But using energy is bit troublesome due to the frame transform. Using mass is simple, since it is a Lorentzian invariance.
However, during scattering experiment. The kinetic energy is much more easy to measure. Thus the kinetic form is used more frequently in experiment.
I will give the expression of K.E. in lab frame later.