WD Black 2TB vs WD RE4 Enterprise TB

[Heaney]

Which 2TB 7200RPM HDD is faster:

Western Digital 2TB Caviar Black WD2002FAEX Hard Drive
Or
Western Digital 2TB RE4 Enterprise Hard Drive

 

[Heaney]

Basically I'm looking for the fastest 7200RPM 2TB HDD this side of £140.

If another HDD is faster, please tell me.