I hasten to add that he was mainly using Gribeauval system artillery which, despite its technical shortcomings, seems to have been very effective.
It is not up to the guns - Gribeauval, Austrian, Prussian of Hannoverian, but how they were used.
So far I don't know what guns Senarmont used at Friedland, the old 1st corps under Bernadotte had Hannoverian guns - in 1805 and 1806 - but in 1807 - already an 11 or Austrian or still Hannoverian guns? (for the 6 pound guns) ??