I used a pirogue all my life and only used a kayak a few times.
The huge advantage of a pirogue is being able transport relatively heavy weight and not draw much water. For example when hunting or crawfishing you may have decoys/nets and gear and game with you and need to go across water that is only inches deep.
In a pirogue that is properly designed you should be able to do this. In a kayak that is the same length you will not be able to carry as much with you.
A kayak is designed for ease of use and maneuverability, and it is much faster on the water. They are also lighter so if you need to drag a decent distance through the woods/marsh that is an advantage. They are also tougher and you won't have to paint them each year if you do drag your boat around.
In my opinion if you can fit everything you need into a kayak it is better. If you need to carry a decent amount with you i would look at a pirogue.
This post was edited on 12/10 at 10:06 am