Overlay plots from PSpice - SIMetrix or SIMetrix to PSpice
Overlaying plots of data seems like a poor way of verifying that two simulators produce the same results. You would be better off calculating the statistics of the difference between the logged data values, such as maximum difference and RMS difference. Be sure to log the data values as double-precision floating-point numbers and perform all of the calculations using double-precision arithmetic.

Keep in mind that this analysis tells you nothing about the accuracy of either simulator, only whether they are consistent with each other.