History. 1  Map of Canary Wharf area in 1899 showing West India Docks and the Isle of Dogs. 2  Canary Wharf aerial view (2009), from the southeast end of the Isle of Dogs, showing the Millwall Dock. 3  Canary Wharf, view east from Cabot Square. 4  London City Airport runway with Canary Wharf and the O2 Arena in the background.
By Investopedia AAA |. A: The main difference between a Roth 401(k) plan and Roth individual retirement account (IRA) is that the 401(k) is offered by an employer as a defined contribution pension, while the IRA is sought out by the individual.y Investopedia AAA |. A: The main difference between a Roth 401(k) plan and Roth individual retirement account (IRA) is that the 401(k) is offered by an employer as a defined contribution pension, while the IRA is sought out by the individual.
Benefits of a Roth 401(k) versus a Roth IRA: 1  Higher contribution amounts for the Roth 401(k) â up to $23,000 in 2013, versus $6,500 for a Roth IRA (catch-up contributions have been included, the maximums are $17,500 and $5,500 if under age 50).he Roth provision allows the employee to choose to direct all or part of his or her salary deferrals into the 401(k) plan to a separate account, called a Designated Roth Account, or DRAC. The DRAC account is segregated from the regular 401(k) account, because of the way the funds are treated.