that's nice graphic
But I'd have some notes about comparison of PhpBB and PunBB (other than that these two forums really can't be compared, since their philosophy is totally difference).
Firstly the installation - PhpBB has "very good" for (yea, good-looking, but quite long installation, since you have set up all things PhpBB has (or at least you should read them, because you are new admin, which doesn't want to screw anything up, right? ) - PunBB is just 7 fields you have to fill and you hit a button. This IMO opinion is better than "normal", it's easy, quick and setting only things you really need.
Ergonomy - PhpBB has very good? All PhpBB3 admins I know off were confused (at least... most of them were, well, lost!) first time they saw administration of PhpBB3... So many options and menus...
Post Editing Format - PunBB has BB codes
Forum Organization - By "subsection" you mean subforums? If so, PunBB has them only with plugin, so I guess it should be mentioned.
Spell checking - actually this is imo browser's field, but it can be mentioned...
Message rating - Karma can be added with plugin.
Announcements - The big blue box PunBB 1.2.23 announcement is without plugin (but yep, it's not forum specific...)
Instant Messaging - I think there was plugin for that somewhere
Users List and Online Users List - OK, PunBB is cut to the marrow, but these features are still included in basic install
Friendly URLs - basic install
Email Notifications - basic install
CAPTCHA - plugin
IP Blocking - if you mean "bans" than basic install, if you mean something like checking registered users with StopForumSpam.com than plugin
Themes - actually I would guess that those 200 aren't really precise... Maybe with 1.2, but those can't be used with 1.3
Social Networks - haven't seen any Facebook integration yet, so I guess this must be mistake.
CMS / Blog Bridges - Wordpress
Moderator per Section & Global Moderator - Yes
User groups - yes
User registration - User Account created by Administrator can be with plugin achieved as well.
Guest Posting - yes
Upgrade Method - one click upgrade
Updates Notifications - yes
Supported Forum Migration - PhpBB3 now as well
And as well it could be imo mentioned "programmer demands" or something like that, because well... it's quite a difference those 300k lines of code of PhpBB vs. those I'd guess 20k lines (written in simple way, that even "younger" programmers understand) PunBB can have.
- scifi browser-based online webgame