Yes, technology does change over time. Systems get improved. However, I don't see any technical superiority by the Austrians, Russians, or Prussians over the French with artillery systems (and the Prussians didn't have one until 1816) for the period 1789-1815. The British certainly did with new gun carriages that were better along with caissons and gun limbers. And spherical case shot was definitely a major step forward in ammunition development.
I do believe that you are not looking at artillery systems as a whole. As I have noted before, artillery systems are not merely guns and vehicles, they are also personnel, education, tactics, doctrine, command and control, organization, and the general mode of operation as well as the idea behind the system-how it is going to be employed. Some of the Russian artillery officers of the period certainly understood this and had to fight a defensive mindset for their artillery arm. Whereas outstanding senior artillerymen in Austria, Russia, and Prussia were few and far between, in France they were not. Further, senior artillery officers were also given division and corps commands in the Grande Armee. I don't believe you'll find much of that anywhere else during the period. You should look at the whole picture, not merely some of the 'tools of the trade.'