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.
Currently two types of plan, the Roth IRA and the Roth 401(k), offer tax advantages that are essentially reversed from most retirement plans. Contributions to Roth IRAs and Roth 401(k)s must be made with money that has been taxed as income.