dyson型號問題 - 家電

想購入無線手持式dyson
但看了半天對型號還是有些疑問
想請教大家:

1.dyson v6 fluffy sv09
http://shopping.udn.com/mall/cus/cat/Cc1c02.do?dc_cargxuid_0=U007212837&dc_cat
eid_0=G_008_001_001_001

2.dyson v6 motorhead sv07
http://shopping.udn.com/mall/cus/cat/Cc1c02.do?dc_cargxuid_0=U006839455&dc_cat
eid_0=G_008_001_001_001&kdid=ERC04&eturec=1

3.dyson-motorhead DC74
http://shopping.udn.com/mall/cus/cat/Cc1c02.do?dc_cargxuid_0=U005825170&dc_cat
eid_0=G_008_001_001_001&kdid=ND02

我的理解是fluffy sv09比是DC74的加強版,多了馬達後製濾網,讓空氣變乾淨?
至於motorhead sv07就不懂有什麼差別了?

我想要的取向是吸地板乾淨,吸床墊(有小小孩),
不知道這3款差別很大嗎?需要買到dyson v6 fluffy sv09(好像最貴)

另外,若不考慮從日本買回,此款網路價格算優惠嗎?
抱歉門外漢,謝謝回答~

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