The positions are closer that way around. I've always used letter bindings, as I've not used a gamecube pad much at all, so it's easier to match things up, and there's also the advantage that on both controllers, A is often used to accept and B to go back. However, people who play games like Smash really need the positions to match, as some things are laid out such that, for example, a low attack uses a lower button.
OS: Windows 10 64 bit Professional
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
CPU: AMD Ryzen 5900X
RAM: 16GB
GPU: Radeon Vega 56
