Good to know (I use EndeavourOS too, BTW). I think its also important to know if you use Wayland.
I think you’re safe to buy whatever floats your boat.
It is not that simple! In example OpenCL was problematic with AMD, which prevents it from being used in applications. Installing ROCm driver as an alternative can be problematic in AMD too, which solves one issue but brings another. I just recently got OpenCL working with AMD, thanks to a new experimental implementation in Rust. My point is, he really should research before buying, because depending on the use case one option is better than the other.