From qpopper to pop3d on AIX

[PM WONG]

We are considering switching from qpopper 4.0.3 to
AIX's own pop3 server called pop3d
(as the latter supports external DCE authentification
right away while qpopper don't, as AIX's is not really PAM)
Has anyone who have used both before kindly tell me
which one has a better performance.
Lists of their pros & cons welcome too!

Pui (Hongkong)