Mortality Table Differences

I was curious about the difference between the 2013 SS life table and the 2012 SOA Individual Annuity Mortality Table (Basic Rates) for a 58 year old.  Just for the heck of it this is my best guess at mortality probabilities for someone my age using the two different tables.  The differences, I gather, reflect the different population of people that seek annuities vs. a more general population.   I'm not sure that this changes my planning because my planning conservatism already reflects the longevity risk implied in either table but if I were to use a longevity formula like a Gompertz equation I might move the mode out a bit further than I have been.