Ohio State is located on an urban campus in a vibrant, large city (Columbus, OH) with a city population of close to 900,000 and a metro population of ~2 million. University of Delaware is located in Newark, DE which has a population of about 30,000. So you have to ask yourself which environment you’re looking for: one of the largest cities in the U.S. or a small college town?
Also, school pride and overall academics (especially for engineering) can be considered to be better at Ohio State, and it is more prestigious with a lower acceptance rate.