difference between kayak tour companies

Hi

I'll be in EC next month with my brother to check out The Everglades. Unfortunately we only have time for a 4 hour tour. Can anybody offer insight into the different approaches/personalities/goals of Everglade City's kayak tour companies. Most of them have excellent ratings, so I'm trying to get a better idea as to which one best suits us.

We're not looking for amenities or convenience. We're both in good shape and don't mind roughing it or some weather. I'd like to go with somebody who's been kayaking in The Everglades for decades and has an eye for natural/otherworldly beauty. My brother prefers a guide with exceptional knowledge & communications skills. We'd both prefer a wrinkly old timer, but that's not a deal breaker.

Thanks in advance.

J