I Imagine the european rabbits will be in Eurpoe while the cottontails will be here in the USA, LOL.
Sorry, just had to joke arund, really I didn't know there was a rabbit similar looking to a cottontail.
It appears that the european rabbit don't have as much white lines on it's face and jaw line as a cottontail. I looked up the images of both rabbits online and completely understand why you ask, I would definately misidentify one over the other.
t/c223encore.