sorry my silly question, but why does you battery ALWAYS show 95% btw. in window 100%? Is it an "endless battery"
Now in real: a battery has a "design capacity" a "full loaded capacity". E.g. the "full loaded capacity" shrinks in case of battery gets older. Maybe win is using "max full loaded capacity" as 100% while LMDE is using "desing capacity" as 100%. You can check this values at the power manager statistic.
newest LMDE at asus eeepc901, stable LMDE at eeepc1215b (AMD APU), debian at server