This comparison calculator or a tool which helps you evaluate the difference between a traditional IRA and Roth IRA. Roth IRA is a type of retirement savings arrangement, called as individual retirement arrangement in the US, originally called as "IRA Plus". It was proposed by Senator Bob Packwood of Oregon and Senator William Roth of Delaware in 1989. The below Roth vs Traditional IRA calculator takes into account both the funds outside IRA and funds from IRA.