User blog comment:Kaido King of the Beasts/Chapter 844: Always a Dump Guy/@comment-1940096-20161028042634/@comment-53539-20161028145612

Rare is when the meat is still quite juicy and red, this due to much of the blood water and other juices from the animal still being present.... Well Done is when its truly cooked and there is no red meat (though its not burnt). the closer you get to well done, the less red and juicy it is.

Well done is better for you as the bacteria in the meat is well dead, supposedly. But its dry and has lost all the tenderness to it, so some prefer med-well because it has a little bit less dry. Compared to rare which though is cooked is often not that cooked (lightly in fact) and can still carry a LOT of bacteria.

Either way, its up to personnel tastes... The difference is often a matter of minutes. But some places might as well serve you raw steak... I've had steak in a restaurant quite a few times. The comparison is a little strange as its not quite a perfect match for Rare-well done meaning. :-/