I just googled. I don’t see where UIUC is ranked higher as a National University (34/47 UR/UIUC) or in Economics (60 vs 64 UR/UIUC), but if you’re using a different source, suit yourself. I just looked on the opening Google search page because honestly, it doesn’t matter to me which you choose. It just surprised me to see someone thought UIUC was higher and I wanted to check to see if my thoughts were correct or not.
Ranking only goes so far anyway to me.