Those are 2 completely different races. My personal opinion is that collegiate nationals oly is a better prep for a HIM provided you have the endurance than vice versa; but I think the FL70.3 is the better race. Other factors to consider:

- Travel logistics. Do you live in the Panhandle? If so, choose Gulf Coast.
- Running. If you are a strong runner, choose FL70.3 for the hilly run course.
- Heat. Do you race well in oppressive heat? If so, choose Gulf Coast, elsewise FL70.3 (realizing they both may suck).
- Team. Do you race for anyone besides your school? FL70.3 is national tri club championship and will make a good vibe if you compete for a team.