Hublot Big Bang Question

[crusha7290]

Hi All,

 

I have been looking into the Hublot Big Bang watches on Trusty, and I have what hopes to be a simple question.  Does anyone know the difference between the following two big bangs that justifies the big price difference:

 

http://www.ttw888.com/index.php?main_page=product_info&cPath=279_280&products_id=9456

 

$428

 

http://www.ttw888.com/index.php?main_page=product_info&cPath=279_280&products_id=2046

 

$678

 

They appear to be the very same to me, is it that the second contains a "New A-7750"?

 

Any help would be most appreciated, and/or a recommendation with personal experience on either.  I am definitely serious about pulling the trigger on a big bang, just want to know if there really is a difference in the two.  Apologies in advance if I have missed something simple/obvious.

 

Eddie