If you have two bachelor's degree in related fields, can you mention in your CV only the latest of the two?
I think it would make for an awkward line of questioning at an interview when they inevitably ask what you did during those years and you reply that you completed a Bachelors degree but didn't feel it was good enough to include it. 

Worst case scenario: your interviewer went to that institution and you've just shot yourself in the foot. 

Always include your full educational and work experience as it makes for easy nitpicking at an interview that is easily avoided.