The answer to this question depends on what type of web conferences you deal with, and what specific functionality you expect in your web conferences.
While Esprezo entirely focuses on web presentations in front of a large audience, Comfidence 3.0 is aiming at highly interactive and dynamic group meetings with up to 10 participants. Because all participants can see and hear each other simultaneously, and because each participant can spontaneously contribute to the meeting, Comfidence 3.0 is achieving a real “Round-Table-Feeling”, i. e. the members of the conference are sharing the impression that they really sit around a virtual table.
Those are the ideal prerequisites for dynamic brainstorming sessions, difficult team meetings, and demanding webinars with very small groups. Comfidence furthermore supports those web conferences with a set of very powerful functions, including collaborative desktop sharing, chat, file transfer, or a WYSIWYG recording function, which records all activities within the conference (even including file transfers that in the recording are made accessible as file attachments) within a compact, streamable file for later playback. And last but not least the communication security level achieved in Comfidence 3.0 through SSL substantially leverages trust in difficult meetings.
Esprezo on the other hand is more suitable, if you want to show slides spontaneously (e.g. during an ongoing telco), or if you want to hold a web presentation in front of a large audience. Ad-hoc presentations can be accomplished with a single mouse click. The user interface complexity intentionally has been kept at a minimum in order to allow you and your viewers to entirely focus on the content of your presentation, rather than fiddeling with a plethora of different gimmicks.
If you are still undecided with which solution you want to go, then feel encouraged to test both solutions. Free accounts for Esprezo and trial accounts for Comfidence 3.0 are available on request. You will see that taking a test drive with our solutions is worth the effort.