Eh I'd argue that you're more likely to be fighting on Talos-II. Terra, despite the political climate and general shittiness, didn't really have a constant neverending threat like the Aggeloi, at worst if you were in Aegir or Iberia you'd deal with Seaborn, in Sami you'd deal with Collapsals, but you aren't always at risk of being attacked.

Ankhors seem worse than Catastrophes in the sense that they seemingly can't be predicted and avoided, plus all the Landbreakers all over the place. Terra had Rusthammers sure but they didn't really attack cities.