What is the difference between these 2 accessories

[nixie21]

http://www.amazon.com/gp/aw/d/B009UZBLSG
And
http://www.amazon.com/gp/aw/d/B00B1MTZPM/ref=mp_s_a_1?qid=1361823338&sr=8-5&pi=SL75

Thanks
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[ritchea]

SlimPort