The first of the two outputs corresponds to CVX"s Successive Approximation method, which was used because there were CVX expressions in the exp and log family in the program. The second output must correspond to a program which didn’t have such CVX expressions.
For additional explanation, see http://cvxr.com/cvx/doc/advanced.html#the-successive-approximation-method
and
CVXQUAD: How to use CVXQUAD's Pade Approximant instead of CVX's unreliable Successive Approximation for GP mode, log, exp, entr, rel_entr, kl_div, log_det, det_rootn, exponential cone. CVXQUAD's Quantum (Matrix) Entropy & Matrix Log related functions