How do I choose between 32-bit and 64-bit export?

I was wondering how important it is to have both the 32-bit and 64-bit version of a game when exporting to Node Webkit. I'd rather just have one install file instead of two and am wondering if I can just use the 32-bit or 64-bit install file or if people will run into issues with this if I choose one.

I'm also curious how people that have their games on Steam account for this--if their install file just uses one or the other...

Thoughts?

Thanks!

you could just use the 32bit if you want only one. anyone can use that. noone should have any problem

that's kind of what I was thinking of doing. Not sure if I'm really losing anything by dropping the 64-bit version...