One of the biggest factors in SE algorithms today is the website's link popularity. By link popularity, I am addressing specifically inbound only text links, not reciprocal or 3 way links.

With this said, it is possible to rank high without a lot of content as long as the site has plenty of inbound, quality text links from reputable sources.

Lastly, both of these sites are providing a service that is local to the area, right? Local search results are very easy to control requiring less inbound links than it would if you were trying to rank high for world wide search terms.

You should be able to rank higher than these 2 sites if your site has more content than they do and if your site gets more inbound links than they have, and they don't have that many, so it shouldn't be too hard.

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E. Armand