Yesterday no.10 closed the night at 277mv 0.99ma 16.5degC.  This morning it was again at 277 0.99 yet at 15degC.  So, I can at least say the lower temps aren't negatively effecting performance.  In fact if the leads of both sets of meters had the same resistance(fairly sure they do not) then no.10 might actually be outperforming no.9.  I may swap meters around later and test that theory.