No. The two are not the same.
Dental insurance is a type of insurance where you pay a premium and after any deductibles or copays, insurance pays for covered dental expenses, either in full or partially, up to an annual maximum. Insurance plans may include limits on the number of services covered within a certain number of months or years. Also, plans may exclude some services, like orthodontics or cosmetic services.
Dental discount plans like Dental Savings Complete operate more like price clubs. You pay a fee, and you get access to certain discounted rates at participating dentists. There’s no payout from the discount plan company to your dental provider. Additionally, dental discount plans may include discounts for a broader range of services your dental insurance doesn't cover.
Note: Both are generally a better option than paying cash out-of-pocket because both have negotiated lower rates on dental care with the dentists involved in their networks.