The Unit DB states different types of armor, for example "experimental" for Megalith, "normal" for Brick, "light" for Soul Ripper. Terms like "heavily armored unit" are used regularly.
I cannot find an explanation of this parameter in the forum or the wiki.
What is armor? Is it different than just high HP? It would seem so, if a Soul Ripper with 90k HP is said to have light armor. Are there any weapons better or worse to counter armor then?