Is it better to have a fee schedule or coinsurance with 30% for dental insurance?t?

I'm looking at getting dental insurance. Is is it better to have one with a fee schedule for many things (I don't think they pay any of this, at least all it says is fee schedule) or to have it be coinsurance and it ranging b/t 10-50% depending on the service. They both have the same deductible % max coverage and the one with the fee schedule is a few dollars more per month.
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If we're not considering cost then the insurance is better. BUT, it depends on the cost. You'll find the Ameritas Dental Insurance on my site as well as a search engine that'll look up 30 different discount plans (fee schedule). With dental plans going for a discount plan isn't so bad because insurance only covers $1,000-$1,500 anyway. In other words a root canal isn't going to cost you your home like a heart attack would.
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