So I was digging though
www.coh2-stats.com, looking at damage done to garrisons and I noticed katy and werfer do 1x penetration & .25x damage but stuka does .25x penetration and 1x damage. I'm not too familiar with coh2 mechanics but does this lead to any differences overall damage? Almost all other explosives are modified on damage when it comes to garrisons (except Sturmtiger as far as I can see)
Links to the pages if interested
Katyushka Panzerwerfer Walking Stuka