What's the difference between a 1620 and a 1620a?

Newegg now has the 1620 in stock for 70 dollars. Is there a difference between the drives or did newegg just leave out the a?

Also why hasn’t newegg updated the stats on the drive? do they still have old firmware on it?

See this before you buy…http://club.cdfreaks.com/showthread.php?t=124589

all 1620’s come with out the 4x dl software…you must upgrade yourself or wait for the pro version.