Different vantage points. You can look at this as a biased sales pitch, or rather as the start of something, a work in progress. I prefer the latter. For those of us who have tried to do such comparisons, they are trickier than they seem: its not like comparing 35 mm SLR's, which are all about the same - the variations in the platforms (and their configurations) can confound such a summary.
Comparisons can be tricky. There are always those that are not on the list, for example, the Linhof Techno. Having tried separately to compare it with these other tech cameras (which are more of a family) leads one to realize that the variations in these cameras are hard to describe concisely. If the list were more complete, wouldn't view cameras, Sinar's Artec and lantec, etc. be on the list? What do you do with stitching backs? And the FPS - should it have two listings, alone, and in combination.... heck, not even Alpa is sure they know all the possible combinations for their own game changer.
Where Doug may have stubbed his toe is that he probably started out from a commercial side (here's what we sell and recommend), decided to share that (nice...thank you.) and then added Alpa for convenience sake for potential customers. In so doing, he made some assumptions as to what to show or not (accessories, sliding backs, Max vs. XY, FPS, etc.), which is quite tricky.
Some may look at this and say "raw commercial intent", but its likely more a result of how the process unfolded, and with Doug's pretty good work here, likely with the best of intentions.
In hindsight, perhaps a clearer separation between "stuff we sell" and "stuff by others" would have helped. Another potential improvement would be to add lenses that are not currently in production - which would be most useful, although if the listing were totally complete, what would Doug have still to do?
Its a start, commendable, and hopefully to be extended.