Different Samsung 840 SSD models? (potentially stupid question, sorry)

firsttimer1

Reputable
Aug 21, 2014
3
0
4,510
I apologise in advanced for my lack of computing expertise.

I'm looking to buy the samsung 840 sdd, but I'm not sure what the difference is between the "Samsung MZ-7TE120BW" and "Samsung MZ-7TE120KW" models are (one ends in KW and the other in BW).

Here are links to both of pcpartpicker:
http://uk.pcpartpicker.com/part/samsung-internal-hard-drive-mz7te120bw
http://uk.pcpartpicker.com/part/samsung-internal-hard-drive-mz7te120kw



Also amazon has 3 listings for the ssd, all from samsung. The first is just "sata", the second is "basic sata" and the third is "Basic SATA III 6Gb/s". What is the difference between these?

Here are the links:
http://www.amazon.co.uk/dp/B00E3918EG/?tag=pcp0f-21

http://www.amazon.co.uk/Samsung-120GB-Basic-Solid-State/dp/B00E3W15P0/ref=sr_1_2?ie=UTF8&qid=1408661317&sr=8-2&keywords=samsung+840

http://www.amazon.co.uk/Samsung-120GB-Basic-Solid-State/dp/B00M4207G4/ref=sr_1_11?ie=UTF8&qid=1408663185&sr=8-11&keywords=samsung+840

Thank you :)