competition

Miami is by far the most difficult of the three. Miami has one of the most competitive all around greek systems in the North and takes it extremely seriously. The process is more traditional and "Southern" than any other schools in the midwest.

Ohio State is also pretty competitive, especially for the top sororities. The girls there overall aren't as attractive as Miami girls, so it would probably be easier for a Miami girl to get a bid to an OSU sorority. They also don't take themselves nearly as seriously as Miami

Honestly, don't know much about OWU, besides the fact that its a small school with a pretty serious greek system for its side. I know a bunch of weird-hippie-liberal girls who went there and still got bids so I assume its not too difficult.

OWU could be a challenge because of the lack of chapters/size. Unlike Miami and OSU where there is enough chapters for most girls to get a bid somewhere (if everyone didn't rush like idiots and only try to only get into the top houses only to fall short and end up on the outside), OWU does not have as many sororities to rush and many of the one's that are there are very small and do not look to take many people.

Miami far surpasses both schools. It's extremely cut-throat, and you're lucky to even get a bid to a lower-mid sorority. Miami grooms its sorority women a certain way in that they come out a certain way after graduating.

Regarding the above, OSU sororities aren't hard to get into. Their "top" sororities (if you can even call them that in a weak Greek system) would be lower-mid to bottom tier sororities at Miami. It's a big state school with second rate girls.

OWU is private but isn't that great of a school anyway. It's Greek system is eh and therefore doesn't pale in comparison to Miami's.

I have no clue. I never went to Miami. I just visited a lot and had friends who went Greek. Take my opinion with a grain of salt.