Dear Customer,
Welcome and Thank You for posting your query on HP Support Forum.
I did research and found technically both are same. 481409-001 is the Latest and its available.
http://www8.hp.com/us/en/products/oas/product-detail.html?oid=3806461#!tab=features
Hope this helps, for any further queries reply to the post and feel free to join us again
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Thank You,
GBL84
I am not an HP Employee
