Right. Complaining about spelling mistakes in an international forum isn't helpfull at all. I for example am German, Motis is Israeli and we even have Monglians around here.
Concerning the thread-question: I guess it is hard to find real differences without excellent insider knowledge. There sholud be nothing like a progressive left wing fair trade heya around, I am afraid. ;-)
And, as mentioned, many heyas don't even have a sekitori. And a heya with 3 or 4 Sektiori (Makuuchi or Juryo ranked rikishi) can be without any sekitori 5 years from now.
Much easier to find out about are the individual style and manners of a rikishi: Is he doing henka? Is he giving extra shoves? Does he use grips that can hurt a guys elbow? Though he has an arrogant appeal, Kisenosato i.e. is a very fair acting rikishi. An other example comig to my mind is Aoiyama - though both certainly don't do very exciting sumo.
Ichinojo will never do a henka as well - he just isn't fast enough.