crwdns2934241:0crwdne2934241:0 mayer

crwdns2934249:0crwdne2934249:0:

No.  See the comparison chart for features here:  http://www.everymac.com/systems/apple/macbook-air/macbook-air-faq/differences-between-macbook-air-late-2010-mid-2009-models.html

crwdns2915684:0crwdne2915684:0:

open