The only reason you might prefer a different FTP server to vsftpd is if you really need the configurability of one of the more bloated FTP servers. Having said this, note that vsftpd caters for the vast majority of use cases. Even if vsftpd appears to be missing a feature, it is often satisfied by an external component such as PAM or xinetd / tcp_wrappers. In this regard, vsftpd is being a small modular component in the proper spirit of UNIX. Finally, consider moving to vsftpd even if it means sacrificing some whacky feature of your current FTP server. The security, performance and stability gains are waiting for you.