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.
Also worth noting is the difference between contribution limits for the Roth 403(b) and Roth IRA. Contribution limits are substantially lower in the Roth IRA. In 2015, for participants under age 50, a Roth IRA allows contributions only up to $5,500 annually, compared to $18,000 for the Roth 403(b).lso worth noting is the difference between contribution limits for the Roth 403(b) and Roth IRA. Contribution limits are substantially lower in the Roth IRA. In 2015, for participants under age 50, a Roth IRA allows contributions only up to $5,500 annually, compared to $18,000 for the Roth 403(b).