Thanks jakeopolis!
I am guessing you are in Quebec, but maybe you (or someone else) can answer this: it seems that there is an exception in which case cumulation of the two scholarships is allowed and that is for students outside of Quebec whose tuition fees are greater than the FRQNT scholarship (Sec 3.5.6 in guide). It is not clear for me however, because it says after that "The tuition fees must not be reimbursed by any other organization". Does any organization includes the advisor/graduate school? My tuition fees are covered by my advisor/school.