Which laptop memory?

[logi-cat]

hi, im looking to add an additional 4gb of memory to my laptop but can't decide between the two. Both priced the same and specs are the same, but which one?

http://www.overclockers.co.uk/showproduct.php?prodid=MY-153-CR&groupid=701&catid=8&subcat=1264

or

http://www.overclockers.co.uk/showproduct.php?prodid=MY-322-CS&groupid=701&catid=8&subcat=1264

 

[logi-cat]

crucial it is, thanks