  In this paper, we characterize the boundedness and compactness of differences
of weighted composition operators from weighted Bergman spaces $A^p_\omega$
induced by a doubling weight $\omega$ to Lebesgue spaces $L^q_\mu$ on the unit
ball for full $0<p,q<\infty$, which extend many results on the unit disk. As a
byproduct, a new characterization of $q$-Carleson the measure for $A^p_\omega$
in terms of the Bergman metric ball is also presented.
