Hi
Our camera POI file has more camera locations than your old file.
You can open and explore your old file with our POI Editor: http://garmin.gps-data-team.com/extra/
I converted all my old files to CSV and then compared them.
There was around 1344 points, less than your new file.
Obviously you can't go by size of GPX files.
I have noticed that the alert for Variable Speed Cameras (WAV File) says "Warning School Zone Ahead" rather than a more appropriate alert such as "Variable Speed Camera Ahead". Could you please change it to a more meaningful alert?