What does a company does:
a) Takes a sample of your Saliva
b) Extracts DNA from it
c) Take a dozen os so small Samples from that DNA, and compares them to reference populations.
d) Since due to being insufficient, every sample will yield different results, the lab average those results
So it follows that no 2 tests will yield the same results until the number of samples the companies take are sufficient, and/or the quality of the samples improves enough.Therefor, if you take tests from two different companies and upload them on Gedmatch it is almost certain that they will calculate different result each, as the processed genetic material each Company tested would be different(the samples are not reflecting of your DNA-too small-not enough markers).
But in your case the differences are trivial so i dont see much of a problem. Nevertheless, If you take the average between the two, in all likelihood you will move closer to the real percentages.