The difference is like the difference between a suit and a tuxedo.
Meaning: There's barely a difference.
I know some of you know the difference between a suit and a tuxedo. However, I didn't really know until recently. o_o. I came up with this idiom because I was wondering what the difference was between a suit and a tuxedo. And I found out what the difference was. Apparently, tuxedos are "fancier". Looooooool. So like yeah. :x. This idiom might by useful. .__. Have you ever tried making an idiom? Please share your stories by commenting in the Comments section below! :D.