Here are the last line for the 2 log files got form 2 PCs with different Gurobi versions:
Gurobi 6.0.5 (win64) logging started 10/22/15 22:49:34
Optimize a model with 698 rows, 3577 columns and 51107 nonzeros
Coefficient statistics:
Matrix range [3e-01, 1e+00]
Objective range [1e+03, 2e+03]
Bounds range [1e-01, 4e+00]
RHS range [1e+00, 1e+00]
Concurrent LP optimizer: primal simplex, dual simplex, and barrier
Showing barrier log only...
Presolve removed 174 rows and 885 columns
Presolve time: 0.09s
Presolved: 524 rows, 2692 columns, 49928 nonzeros
Ordering time: 0.00s
Barrier statistics:
AA' NZ : 3.146e+04
Factor NZ : 5.084e+04 (roughly 2 MBytes of memory)
Factor Ops : 6.776e+06 (less than 1 second per iteration)
Threads : 14
Objective Residual
Iter Primal Dual Primal Dual Compl Time
0 4.38449634e+06 -3.29777743e+06 6.01e+02 2.27e-13 3.87e+03 0s
1 2.05411980e+06 -1.50396561e+06 2.78e+02 2.39e-12 1.51e+03 0s
2 8.09554904e+04 -3.36190451e+05 6.16e+00 1.43e-09 8.98e+01 1s
3 2.50223843e+04 -6.73002760e+04 2.30e-01 2.74e-10 1.70e+01 1s
4 2.31263289e+04 -4.27383689e+03 1.29e-01 6.02e-11 4.93e+00 1s
5 1.86479982e+04 2.95039624e+03 3.68e-02 3.79e-11 2.83e+00 1s
6 1.72636678e+04 9.60463076e+03 1.88e-02 1.78e-11 1.38e+00 1s
7 1.60923896e+04 1.22745381e+04 5.66e-03 9.27e-12 6.90e-01 1s
Barrier performed 7 iterations in 1.16 seconds
Barrier solve interrupted - model solved by another algorithm
Solved with dual simplex
Solved in 2525 iterations and 1.17 seconds
Optimal objective 1.525169509e+04
Gurobi 6.0.5 (win64) logging started 10/22/15 22:49:36
Optimize a model with 698 rows, 3577 columns and 51107 nonzeros
Coefficient statistics:
Matrix range [3e-01, 1e+00]
Objective range [1e+03, 2e+03]
Bounds range [1e-01, 4e+00]
RHS range [1e+00, 1e+00]
Presolve removed 698 rows and 3577 columns
Presolve time: 0.98s
Explored 0 nodes (0 simplex iterations) in 1.06 seconds
Thread count was 1 (of 16 available processors)
Optimal solution found (tolerance 1.00e-04)
Best objective 8.483193743438e+04, best bound 8.483193743438e+04, gap 0.0%
Gurobi 6.0.4 (win64) logging started 10/22/15 21:22:59
Optimize a model with 1204 rows, 1138 columns and 7232 nonzeros
Coefficient statistics:
Matrix range [5e-01, 1e+03]
Objective range [5e-13, 7e+02]
Bounds range [1e+00, 1e+00]
RHS range [1e+00, 5e+02]
Found heuristic solution: objective 592.733
Presolve removed 967 rows and 841 columns
Presolve time: 0.12s
Presolved: 237 rows, 297 columns, 1257 nonzeros
Variable types: 0 continuous, 297 integer (297 binary)
Root relaxation: objective -2.485705e+03, 210 iterations, 0.00 seconds
Nodes | Current Node | Objective Bounds | Work
Expl Unexpl | Obj Depth IntInf | Incumbent BestBd Gap | It/Node Time
0 0 -2485.7050 0 58 592.73276 -2485.7050 519% - 0s
H 0 0 90.4289952 -2485.7050 2849% - 0s
0 0 -904.71190 0 39 90.42900 -904.71190 1100% - 0s
H 0 0 84.4121449 -904.71190 1172% - 0s
0 0 -337.17382 0 31 84.41214 -337.17382 499% - 0s
H 0 0 0.0000000 -337.17382 - - 0s
0 0 -103.78120 0 20 0.00000 -103.78120 - - 0s
0 0 -78.71920 0 35 0.00000 -78.71920 - - 0s
0 0 -78.71920 0 26 0.00000 -78.71920 - - 0s
0 0 -78.71920 0 47 0.00000 -78.71920 - - 0s
0 0 -22.82118 0 10 0.00000 -22.82118 - - 0s
0 1 -19.21246 0 10 0.00000 -19.21246 - - 0s
Explored 3 nodes (591 simplex iterations) in 0.41 seconds
Thread count was 1 (of 1 available processors)
Optimal solution found (tolerance 1.00e-04)
Best objective 1.136868377216e-13, best bound -1.734948221390e+01, gap -
Gurobi 6.0.4 (win64) logging started 10/22/15 21:23:00
Optimize a model with 698 rows, 3531 columns and 49281 nonzeros
Coefficient statistics:
Matrix range [3e-01, 1e+00]
Objective range [1e+03, 2e+03]
Bounds range [1e-01, 4e+00]
RHS range [1e+00, 1e+00]
Presolve removed 130 rows and 846 columns
Presolve time: 0.02s
Presolved: 568 rows, 2685 columns, 48141 nonzeros
Iteration Objective Primal Inf. Dual Inf. Time
0 0.0000000e+00 1.530000e+02 0.000000e+00 0s
2592 1.5238784e+04 0.000000e+00 0.000000e+00 0s
Solved in 2592 iterations and 0.50 seconds
Optimal objective 1.523878447e+04
Gurobi 6.0.4 (win64) logging started 10/22/15 21:23:00
Optimize a model with 698 rows, 3531 columns and 49281 nonzeros
Coefficient statistics:
Matrix range [3e-01, 1e+00]
Objective range [1e+03, 2e+03]
Bounds range [1e-01, 4e+00]
RHS range [1e+00, 1e+00]
Presolve removed 698 rows and 3531 columns
Presolve time: 1.03s
Explored 0 nodes (0 simplex iterations) in 1.08 seconds
Thread count was 1 (of 1 available processors)
Optimal solution found (tolerance 1.00e-04)
Best objective 7.654257229907e+04, best bound 7.654257229907e+04, gap 0.0%