Flash Drive Encryption: Hardware vs Software?

[CMLew]

Putting cost aside, which would offer a more secure flash drive? Which one would have higher "vulnerabilities" ?

E.g. of Hardware Type:
http://www.kingston.com/en/usb/encrypted_security/dtvp30

E.g. of Software Type:
http://www.newsoftwares.net/usb-secure/

 

[Omnipotent]

Hardware based encryption is stronger as it is built into the USB and is always enabled. Software based encryption however is more susceptible to brute-force attacks, if the attacker is able to locate the counter and reset it as well as parallel attacks where the encrypted files are copied onto another PC to resume the cracking process.