Don't fret about making a decision between two job offers. It is great to have a choice!
Here is a salary calculator that allows you to compare the relative amount of wages for different jobs in various cities http://www.homefair.com/real-estate/salary-calculator.asp
Here is a Cost of Living Calculator http://www.homefair.com/real-estate/cost-of-living.asp
Monster.com has advice on comparing job offers. http://career-advice.monster.com/salary-negotiation/Compare-Two-Job-Offers/home.aspx