Training for 250000 steps as default on TartanAir, but the result is not good as provided checkpoint

[zhujun3753]

After I trained the model for 250,000 steps, I tested the trained model on the EuRoC dataset MH_01_easy and the results are as follows:
max 0.660959
mean 0.014034
median 0.011158
min 0.000964
rmse 0.033552
sse 4.095354
std 0.030476
However, the provided model had following results:
max 0.032710
mean 0.010504
median 0.009865
min 0.001174
rmse 0.012018
sse 0.525447
std 0.005840

Why is the gap between RMSE so large?