Backhoes never had a "standard" in North America, I've probably run somewhere over 50 different backhoes in my life and Cat was the only one I've ever run with SAE, Deere has always used ISO , although they never called it ISO, Case has always had their own proprietary 3 stick setup w/foot swing. If you ordered a new Case you could get "Case" controls or "Deere" controls, no mention of Cat controls. Of course Cat backhoes are not popular in this area , there are probably 10 Case and 7 Deere for every 1 Cat in my region of the US.
All the arguments started when mini excavators started to get popular, the controls were wrong ! Not really but all the old operators thought so because if it had 2 sticks it should work like Deere controls, there were a few rough years there but now we see most of the mini's coming with electric over hyd controls which can be easily switched and Case and Deere are offering excavator style controls in their backhoes as well.
Ray