The "PC" version comes set to 640x480 default resolution and a 256x256 rendering target. It's beyond crap, and you can set it to 1920x1080 with a 2048x2048 rendering target inside FFXI's own config program. 360 will render either 720p or 1080p depending on what your screen is set to, background appears to be 1024x1024.

The OS is trolling everyone here in an attempt to stir up angry comments. Promptly ignore him.