Any difference between these two RAMs?

Or does Crucial rebadge them for their resellers? The first one is through Crucial for around $70. The second one you can get at Newegg for around $50. Also, the 323834 (first one) can only be found on the Crucial web site, however, there are a lot of resellers for the 6464..... I did email Crucial with this question but no response over the weekend. Thank You!

http://www.crucial.com/store/MPartspecs.As...s&WSPN=CT323834

http://www.crucial.com/store/partspecs.asp...WSPN=CT6464Z335