best

the best of those all depends on personal preference. i'd say that ksig and du are kinda the top of the top with sae trailing shortly and sig chi behind them too.
-ksig is lots of chicago bros who drink a lot of beer and have a sweet backyard, kinda an outdoorsy style (forwards hat, flannels)
-du is milwaukee kids and coasties for the most part, pretty chill kinda surfer swag they got going
-sae is minnesota, preppy, i'd say goes the least hard of the 4 but still parties plenty hard
-sig chi, parties the hardest, very fratty dudes, apt style house which you either love or hate