What are the differences between the 3 main AIs?

On this site it says the following:

“Anastrozole, exemestane and letrozole all work in similar ways to each other and share many of the same side effects, although there are some differences.”

The individual sheets for each say much the same thing, so I wonder if there could be an easy-to-compare chart added so one can compare like with like at a glance? Meanwhile, what are the main differences? Many thanks.