as it goes quite a bit further than a stuka barrage does.
Comparison of stuka and katyusha creeping barrage:
As you can see the stuka barrage is stretched out a bit more, while the katyusha creeping barrage has more AoE to the sides.
Also worth mentioning that the katyusha rockets ofc land much closer together, thus making the "dead zone" bigger whereas the stuka rockets land kind of far away from each other, which leaves room for a squad to survive between the rockets.
And even with this I find it hard to determine which barrage performs better.. the katy creeping barrage is vet 1, costs 40 ammo and it has way less punch against vehicles. It's also harder to "snipe" bunched up stuff with the katyusha imo whereas with the stuka you always know the 1st rocket lands on the 3rd chevron