Which type of subwoofer unit is better among these? Plz see inside and suggest!?

Larger diameter woofers produce more bass not necessarily better sometimes a smaller cone will produce a more realistic bass were talking 12 inch as opposed to 15 inch....the thicker the walls of the cabinet are usually the better it will sound internal bracing is also a factor, the size of the bass port has nothing to do with sound quality...it should be tuned to the q factors of the driver correctly thats all....