I actually prefet the engineering units (4000 to 20000) as I can look at it and immediately get useful info on the output signal of the transmitter. If my input data is near 12000 I know I am at 50% of range. If my input data is 9830 I have to do a calculation or at least some mental interpolation to find out I am at 50%.
4-20 is always 4-20. We work with a lot of PLC brands, and it seems like no two handle input raw data the same. Sometimes there are even variations for different model cards from the same supplier. I can't keep that all straight, but after a few decades of 4-20 mA I know what 0%, 25%, 50%, 75%, and 100% signals are!