So if we look at the AnXI data collected in 1819 by General Ruty and combine it with the data from de scheel, the following is the result:
M1765 12-pdr. 41 ball cannister. 7 balls hit target at 800m 11 at 700m
M1803 12-pdr 41 ball cannister. 7hits at 1000m 16 at 9000m 25 at 800m
M1765 8-pdr 41 ball cannister. 8 hits at 700m 10 at 600m
M1803 6-pdr 41 ball cannister. 5 hits at 900m 14 hits at 800m
By using these two different sets of data, the guns would be firing on their own service charge, and using the cannister designed for each gun. The targets used 1765 and 1819 were approximately the same size: 1765 was 5.7m tall and 34m wide, 1819 31m by 5.5m tall.
Thus, potentially the AnXI cannister was more effective and had a longer range than the previous type.
Of note the french cannisters were made from white metal, rather than pure tin used in Britain due to the lack of tin in france and her empire.
This does still proove how the cannister released its ball however.