The other major advantage is the ability for the board to 'kick back' should one run aground, and this can be a very useful safety feature in shallower waters. Board is a higher aspect foil than the standard daggerboard, so it will be slightly more effective. This will help make up for the extra slot drag associated with a centerboard case, and overall performance should be similar.
Note that 'kick up' centerboards are more complicated than a daggerboard, so more maintenance may be required. However, the configuration used has been very well developed and tested, and should be virtually trouble free.