I`ve just been trying Comodo for the last week and it seems fine although the alerts seem a bit strange at first. You can set the security levels manually but I must admit I haven`t messed about otherwise with the defaults. I managed to find a bug in Comodo, pop up on screen told me so! Sent the requested report file and it was bounced!
Don`t know why your IT guy reckons it`s more "Robust" though. Did he say why?