Why are manufacturers so reluctant to change model numbers when they add features?

[Dave Britten]

(11-06-2019 06:06 AM)grsbanks Wrote:  

(11-05-2019 01:42 PM)Dave Britten Wrote:  if there's any difference between the fx-7000G, fx-7000GA, fx-7000GB, and fx-7200G, I certainly can't find it.

The difference between the fx-7000G and the fx-7000GA/GB is the colour of the bezel around the LCD. Otherwise they're identical. However, I've not found a difference between the 7000GA and the 7000GB, and I didn't know there was a 7200G (probably not released in Europe?)

I did a bit more digging on casio.ledudu.com, and supposedly the only difference is that the fx-7000GA and fx-7000GB have "predict x" and "predict y" ("x-hat" and "y-hat") functions that can be used in LR1 mode.

http://casio.ledudu.com/pockets.asp?type=95&lg=eng
http://casio.ledudu.com/pockets.asp?type=175&lg=eng

The fx-7200G appears to be identical to the fx-7000G - the boxes advertise the same number of functions.

http://casio.ledudu.com/pockets.asp?type=148&lg=eng
http://casio.ledudu.com/pockets.asp?type=151&lg=eng