This is the same situation in any number of industries where you can "mix & match" equipment. Even different products from the same company might have radically different UIs. Like anything else, it's not ideal, but you get used to it.
In my previous job, the same thing happened. In fact, one of our selling points was that we had a unified look and feel for all our equipment UI's. It made it easier for salespeople to demonstrate how buying our stuff could reduce training cost and error rates.
In my previous job, the same thing happened. In fact, one of our selling points was that we had a unified look and feel for all our equipment UI's. It made it easier for salespeople to demonstrate how buying our stuff could reduce training cost and error rates.