I have yet to try the kutana. Layering with my tiburons works really well. I can see the kutana being a simple solution that doesn’t require as much on and off but they might be too much in the heat.
Like many here I have both, love the attacks but when it gets in the 80s they are just too much even with the hip vents for me if I am moving. Often use the Katanas for spring turkey in the SE and love them. I think they are awesome but definitely more of an athletic and trim fit compared to the attacks.