i usually ride downhill/bmx but i need a bike for where i now live, which will be used for both road and off road. the question i need answered (please) is what are the benefits and disadvantages of hybrid bikes and cyclo cross bikes?

the two bikes i'm looking at are http://www.evanscycles.com/products/specialized/tricross-2009-single-speed-cyclo-cross-bike-ec016875#show=0 and http://www.evanscycles.com/products/scott/sportster-p6-2009-hybrid-bike-ec016321#show=0