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"Same coverage with a higher deductible" is not the same. You are paying less because you get less. Depending on what you spend towards your deductible, this may or may not be a better deal.
Higher Deductible + Lower Premiums + Healthy Person = Better deal
Higher Deductible + Lower Premiums + Unhealthy Person = Worse deal
You can tune a piano, but you can't tuna fish. You can tune a filesystem, but you can't tuna fish. -- from the tunefs(8) man page