Difference between HTTP Class URI format

Hello Folks,

Just out of curiosity I want to confirm what is the difference between the following URI match in one of my HTTP Class Profile.

regex:/[Hh]][Rr][Dd][Ii][Rr][Ee][Cc][Tt][Ss][Ee][Ll][Ff][Ss][Ee][Rr][Vv][Ii][Cc][Ee]_[Ii][Nn][Tt]/.* 
glob:/[Hh]][Rr][Dd][Ii][Rr][Ee][Cc][Tt][Ss][Ee][Ll][Ff][Ss][Ee][Rr][Vv][Ii][Cc][Ee]_[Ii][Nn][Tt]/.* 

Both of the URI is same, however one is defined with regex, and another one defined without regex. Will it be any difference in terms of traffic processing by LTM, or performance impact?

Thank you, Darshan