If I remember correctly the S14 is 2810-2870 lbs.
S13's are almost exactly 100lbs less.
Not a huge weight difference at all. Don't eat for a week and I'm sure you'd get an advantage. <img src="http://www.zilvia.net/f/iB_html/non-cgi/emoticons/hehe.gif" border="0" valign="absmiddle" alt=':hehe:'>