Can't really say much about the 7.7FX, except for the fact that CF can be a real PITA, in terms of caution about scratching it, locking it up on metal racks next to beater bike owners, who couldn't give a rats behind about scratching your bike up to free theirs. Then there's the where-do-I-lock-my-bike-up-around-here syndrome. There's usually no kick stand and you have to be weary about laying it down some random place. You don't wanna lean it up against anything for fear that it will either get scratched up or it will fall down. If you crash on it, you'll have eternal worries about its structural integrity, forever!

The hybrid DS bikes are just hybrids that are made to do the same thing that any other hybrid can do, except that they carry more weight, due to their suspended forks. If you have some kinda medical condition, then a DS hybrid should serve you well, because they'll better cushion road vibrations and will help to stabilize your bike, should you misjudge your line. Otherwise, a rigid forked hybrid will be more efficient and most likely, more enjoyable as well, with regards to speed.

Therefore, your answer is, IMHO, choose the 7.6FX!