My 2 cents is 'it depends on how you listen'
I might certainly be wrong but here's my take.
If you listen at lower levels then a more simple crossover might be fine & dandy. If you crank things up, then a steeper sloped crossover might be the ticket (and more expensive)
I had a pair of ALK extreme slope crossovers in my Khorns (and also have them in my LaScalas)
The Khorns took about 30 feet before the 3 drivers sounded as though they were a single voice. I would think with a more simple crossover, the sound might blend sooner (closer to the speaker) however, if you lean into the volume it might not sound as good as a steeper slope.
So my opinion is the best one for you depends more on how you listen.