If they are that close together (the same distance from one end of a larger city to the other), I would expand my search on that site to be farther out. That way you can catch large bonuses that sometimes pop up that could make it worth it.
I usually will shop within Indianapolis and Kokomo (about a 60 mile range) but if the money is right and I have time, I will go farther. I put my range to be 100 miles. It does not mean that I normally would drive 100 miles but if I then see a large bonus (like $100!!), then I would jump on it.
Shopping across Indiana but mostly around Indianapolis.