Here is a summary of the basic characteristics of each. Traditional and Roth IRA's are combined for this limit. Traditional and Roth IRA's are combined for this limit. Eligibility to participate is substantially influenced by whether or not you are covered by a retirement plan at work. Eligibility is not influenced by whether you are covered by a retirement plan at work.
Income is a factor in determining eligibility.
Whether this is an advantage versus a Roth IRA depends on a number of factors. Income is a factor in determining eligibility. Whether this is an advantage versus a traditional IRA depends on a number of factors. Contribution is deductible from current income thus reducing current income taxes. Contribution is not deductible from current income thus it does not reduce current income taxes.