Question about 3 & 4 Pin Case Fans

[UMASS]

Hi All: I purchased a bunch of these Rosewill Hyperborea 140mm & 120mm fans. It uses a 4-pin connector.

Link:

http://www.newegg.com/Product/Product.aspx?Item=N82E16835200068

Will this 3-pin fan power splitter work with 4-pin? If so, will the fans just run @ full speed?

Also do you think Hydro Dynamic bearing is better then a double ball bearing? I have always used Vantec Stealth fans here:

http://www.newegg.com/Product/Product.aspx?Item=N82E16811999614

Any insight would be appreciated!