Some people swear by the droops with a divider and some feel that the divider is a restriction.  Full droops that have dividers were available in both horizontal or vertical dividers.

In my opinion, for a full-droop, the American Turbine is the best shape.  There is not  a lot of difference in the shape between the American Turbine and the Berkeley.  If you find a great deal on a good used Berkeley, you won't notice the difference.  Just make sure the steering socket doesn't have too much wear.

Should you consider a mini-droop, the Place Diverter HPH has the best shape.

It is possible to remove the divider, should you decide to.

On a side note, the divider always ends up giving me grief, installing on a Berkeley bowl, because of interference with the bowl plug.  For that reason, I would never buy or recommend a divided droop.  You can cut/grind the divider to clear the bowl plug.