SSH and OpenSSH Comparisons?

Colonel Bleep asks: "My company is finally on the road to getting serious about Unix server security. Though there's a lot more to do, the current push is to replace telnet, ftp, rcp and the like with ssh. Problem is, the security team in charge of the transition is composed mostly of Microsoft-trained techicians that hold varying opinions of open source software. Non team members, such as myself, are kept abreast of developments via email. Input is encouraged. OpenSSH came up during a recent email exchange with the coordinator. It didn't take long for the "isn't proprietary is better?" mantra to rear its ugly head. Though I use OpenSSH at home I found myself at a loss to explain why the corp might want to consider using it over commercial SSH. That's aside from the obvious open source peer review argument, of course. I haven't been able to uncover any direct side-by-side reviews of the two products but I would very much like to pass such a comparison along. What say ye?" Update: 11/14 2:40p EDT by C : Users of SSHv1 may want to take a look at this security bulletin on a potential SSHv1 exploit that is rumored to be in the wild.