Boards amplifier-attenuator are of the same exterior design for WP7300 and WP7200.
I do not even see the difference when adding the index "A":
But changing the software key "MBW" to "HBW" for WP7200 does not change it in WP7300, if you check the bandwidth.
This changes the bandwidth, but to a very small extent.
In this picture you can see the bandwidth change in WP7300A depending on the enabled options: "LBW"(blue), "MBW"(yellow) and "HBW"(green), denotes WP7100, WP7200 and WP7300 respectively:
Same for WP7200:
Here is the graphical overlay of the WP7300 and WP7200 frequency response while the HBW option is enabled in both:
Similarly, with the DSP turned off:
I took these screenshots 2 years ago.
As you can see, there is something else besides software bandwidth settings.
However, I have not yet verified the effect of the calibration data that is stored in the EEPROM chip in each of these amplifier boards (which are duplicated in the Calibration folder). I also see several trimmers on this board that can be explored.
Addition.
See what is contained in the EEPROM 24LC64 (Soic8) of the WP7300A entry boards (in one of the channels):