Is there a reason to pack the game in 64bit and not 32bit?

I know 64bit supposed to be faster and can use more ram, but did anyone actually tested it and noticed an improvement?

Those are the main benefits, and they definitely do have an affect.

But of course, 64-bit can’t be run on 32-bit systems, so you almost always package both EXE’s and they share the same package file.

Though it’s rare to find someone who plays games on a 32-bit system.