Sir, a full exploration of all of the facts and an exhaustive comparison between all the Unix variants has been the subject of many books, panel discussions, conventions, and academic discourses, and has yet to be fully explored. I think that a high-level overview is both more productive, and better suited, for a humble posting on an electronic forum.
Actually, there is a dichotomy between OpenBSD and all other operating systems. Theo's political stances have brought a lot of problems for the development of OpenBSD as compared to other BSD dstributions, but at their core, the OpenBSD devs are concerned with server security, open code and open protocols and not necessarily the latest features. This process is called security auditing.
They still have only a generally limited window manager, but without the plodding devotion of the OpenBSD team, many binary WiFi blobs (that have been reverse engineered by the OpenBSD team) would still be enabling security breaches while legitimate users were none the wiser. SSH, and the use of remote terminals for all operating systems, have been vastly improved because of the OpenBSD project and it's (simple) minimum requirements which are generally unmet by the commercial software industry.
Whether or not the OpenBSD platform ever grows into a popular client for web-browsing and document editing, it seems as if the community of developers using OpenBSD for their work have definitely succeeded as administrators over the years. And because of the license BSD provides to developers, all of the code in OpenBSD can be used in other projects, whether or not those other projects meet the political standards of Theo de Raadt.