Hydra is safer for your engine (Wide band, knock control), offers more control of things, includes extra goodies such as launch control, offers stellar support from FM, can handle higher power. Your ODBII port will not work, which means you will not get the stock ECU's built in troubleshooting help when something goes wrong, and the annual inspection will require taking it to a station with the ODBI roller test.
Exede leaves the stock ECU in place so it maintains ODBII functionality and it is a little cheaper, but not as full featured.
Pick your poison. Both are respected kits from respected companies. They do things a little differently, but should offer similar price and power results. Many have their favorite, but the argument of who's kit is best usually ends in a draw. FM's support is legendary, BEGI's not so much. BEGI is close enough to drive down and drop the car off for install if that interests you.
Don't forget to budget for a clutch and an aluminum radiator as it gets hot in Texas. Fans are worth consideration as well.