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.
The Roth 401(k) combines some of the most advantageous aspects of both the 401(k) and the Roth IRA. Under the Roth 401(k), employees may contribute funds on a post-tax elective deferral basis, in addition to, or instead of, pre-tax elective deferrals under their traditional 401(k) plans.owever, employers' contributions cannot receive the Roth tax treatment. The matching contributions made on account of designated Roth contributions must be allocated to a pre-tax account, just as matching contributions are on traditional, pre-tax elective contributions.