Sony DRU-510AK vs DRU-510A? Any difference?

[Lonyo]

I have a Sony DRU-510AK drive, says AK on the box and everywhere else, but I can't find the AK anywhere on the internet. I can find the DRU-510A on the Sony.co.uk website. Is there any difference between the A and the AK drives? It seems to have the same specs as the 510A listed on the website, so I'm guessing it might be the same drive. Can anyone confirm this?

 

[Rufio]

K