NA valorant is like this tbh. Aside from Optic and c9, all the other teams seem like they could beat each other at any time. (Altho I think LG, XSET, and MAYBE guard are a little better than the rest)
I think it depends a lot on who prepped more and who has a good day. All teams in the NA challengers are pretty close in terms of gameplay except for Optic (better than the rest) and Sentinels (worse than the rest).