Deferred compensation plans tend to offer better investment options than most 401(k) plans, but are at a disadvantage regarding liquidity. You will need your Social Security Number and PIN to enroll in the Plan online.457(b) plans and 401(k) plans are very similar. Both offer you the opportunity to make tax-deferred contributions to a retirement account. In this article, we'll be covering how deferred compensation plans work, the benefits for your financial plan, and whether they're better than a 401(k). A 401(a) plan is an employer-sponsored money-purchase retirement plan funded with contributions from the employee, the employer, or both. Plan Comparison Video. Deferred Compensation 457(B) - Vanguard. In lieu of a deferred allowance, you may withdraw your member contributions with interest upon your termination.