Undoutably the Heinkell 111 is better
bigger bomb load
better armament
faster
The Blenheim had a LITTLE longer range but not much
The Heinkell also had better armor
I have gone for the HE111. I have a dvd with some flyers who piloted the Blenheim and most of them say they didnt think much of them one poor old sod Crashed three times in four months the last time he was hitching a lift in the nose and when they landed the plane sunk in the soft ground pitch poled and snapped off the nose with him in it and he found himself sliding across the airfield in a transparent tobogan.