I don't know which simulator you are using, since hspice language and commands are available for more softwares, I think it can cause differences.
I don't know what is .lis and .mt0 files either. I guess .mt0 is the .op analysis output file, and the .meas command gives back .tran analysis result in .lis file, not sure. If that is the case, two analysis not unconditionally use the same integration method, engine accuracy settings, or your initial condition settings for .tran analysis are not the same as the final state conditions in .op analysis.
Try to set .tran analysis to run until steady state is not identified, maybe it is the reason, or modify run time, accuracy settings, integration method.