One page you can look at is this one:
http://www.freeswitch.org/node/100
This is a comparison matrix of all of the existing Asterisk based conference apps including app_confcall which is my enhanced version of app_meetme I wrote before I started the FreeSWITCH project.
Most of the features from app_confcall were ported into mod_conference.
Besides the ones listed mod_conference also has the following differences (or at least the ones I can think of) :
*) Pure software implementation (no hardware timing interface)
*) Direct integration to FreeSWITCH TTS abstraction for on-demand text to speech.
*) Ability to transfer one or more parties to a new conference on the fly.
*) Programmable Relationships between callers, A B and C in the conf so C can only hear A but not B etc.
*) Presence integration, connects to BLF , jabber buddy list etc.
*) Mappable DTMF keys to a common list of functions or to events for external controls.
*) Fully controllable mute/unmute etc from EVENT SOCKET interface.
*) Ability to record to shoutcast (with help from mod_shout)
*) Video from speaker with the floor broadcasted to other callers.
*) Support for 8k 16k and 32k audio mixing with resampling to mix unlike rates.
There are probably more, but many of them are just inherited from the regular list of FreeSWITCH on-board features. http://wiki.freeswitch.org/wiki/Specsheet
--
Anthony Minessale II
FreeSWITCH http://www.freeswitch.org/
ClueCon http://www.cluecon.com/
AIM: anthm
MSN:anthony_minessale@hotmail.com
GTALK/JABBER/PAYPAL:anthony.minessale@gmail.com
IRC: irc.freenode.net #freeswitch
FreeSWITCH Developer Conference
sip:888@conference.freeswitch.org
iax:guest@conference.freeswitch.org/888
googletalk:conf+888@conference.freeswitch.org
pstn:213-799-1400