We also have the 02BA version in breakout board format: https://www.bluerobotics.com/store/sensors-sonars-cameras/sensors/bar02-sensor-pcb-r1-rp/
I’m not sure why the curve changes more initially! That would be a question for Measurement Specialties I think.
Here’s the accuracy chart for the 02BA version:
(note that in the application notes it says the sensor must be dried once per day for this accuracy)
At the range you’re operating in, it has +/- 0.5 mbar accuracy, which is 100 times better than the 30BA version.
The 02BA version will be better than the 14BA version as well.
-Rusty