the rate of flow will vary from day to day for the same bean and grind size. there is also huge variation in how different coffees.
comparing wildly different weights of different coffees will not be particularly useful.
some baristas are very particular about both grind size and weight of coffee as these two things can be tweaked to ensure the rate of extraction is correct. test shots get pulled throughout the day and if the timing for the shots has varied too much they will make adjustments accordingly.
if your coffee is pre ground it will age quickly and this will also change its characteristics once the bag is opened.
the rate of flow will vary from day to day for the same bean and grind size. there is also huge variation in how different coffees.
comparing wildly different weights of different coffees will not be particularly useful.
some baristas are very particular about both grind size and weight of coffee as these two things can be tweaked to ensure the rate of extraction is correct. test shots get pulled throughout the day and if the timing for the shots has varied too much they will make adjustments accordingly.
if your coffee is pre ground it will age quickly and this will also change its characteristics once the bag is opened.