Don't drink this version of Everclear, the denature will inhume you: 
but,
That price difference bugs me. 55 buck for a gallon, and for 1/11th of that more, $60, you can get 4 liters.
But a gallon is 128 ounces, so four liters in opunces, based on the price difference, should be... 139.6? Nope. 135.25ish.
You are being cheated out of a gill. Buy Imperial.
And this is a lab supply place. People buying this stuff are often lab type people. Smart chemistry and math types that can do the conversions in their head.