I'm in agreement on this.I would say Solon C has been more competitive than Centerville the past 2 years and will be this coming year. Not only do we have more teams and more national attending teams, but we have more NESs and are continuing efforts to recruit more as well as asking nationally awarded alumni to come volunteer.Concur. No invitational has ever had a competitive field comparable to Nationals. MIT 2016-2018 came close-ish, nothing else is even within range.I would dispute that these invitationals are necessarily more difficult than nationals. At the Solon Invitational C, for example, Solon finished with 167 points in a 70-team field, whereas at nationals with a 60-team field, Solon's score was over 100 points higher. Teams may bring reserve teams, but the sheer breadth of elite-level teams isn't at nationals level. This applies to pretty much every invitational (even SOUP and MIT this year did not have as tough a field as nationals, in my opinion). Certainly, these invitationals are more difficult than pretty much any state tournament.
Anyway, of the two invitationals, Centerville B is a good level more difficult than Solon B (and it's much more difficult to find any info online about the latter). Solon and Centerville C are at about the same level, with the stronger of the two varying from year to year.