Full on creekers tend to have displaced hulls (rounded bottoms). This allows for much safer landings when landing waterfalls. The point being that water displaces away from the bottom so that you will not feel the full force on your spine of a flat hull landing on water. The drawbacks are that they don't keep a line as well and assorted other issues depending on manufacturer.
RR/Creekers are generally longer, more volume, overal beefier river running kayaks. They can do very well on large volume rivers and even do great in many creeks. They tend to have flat hulls that allow for surfing and sharper chines for eddy catching.
It depends on what you want to get into... but I doubt you will be running major vert in your first year of creeking... Maybe the H3 is best??? Again, it's up to you.
"Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body. But rather...To skid in broadside, thoroughly used up, totally worn out, and loudly proclaiming... WOW !!!! What a ride!!!!!!"