OAM with mod_sso or AccessGate

Hi Everybody,
I am trying to implement SSSO with e-business suite R12.1.3 , in this case i have two options as below , my question is which one should i use and why ?

mod_osso  or Oracle E-Business Suite AccessGate ?

• Section 1.3: Registration components for Oracle E-Business Suite Release 12 with Oracle Internet Directory 11gR1 and Oracle Access Manager 11g with mod_osso
• Section 1.4: Registration components for Oracle E-Business Suite Release 12 with Oracle Internet Directory 11gR1 and Oracle Access Manager 11g with Oracle E-Business Suite AccessGate

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