Some background history of the Features comparison page.
LIO was the first who has had similar comparison page http://www.linux-iscsi.org/index.php/Overview_Page. It was and still is very much wrong about SCST. I asked that page author, Nicholas Bellinger, to correct the wrong items (see my e-mail), but Nicholas Bellinger refused to do it without any explanations. Moreover, he blocked my access to the LIO mailing list, preventing me from tell that to the interested people myself. After all our previous discussions and with his skills and experience it's nearly impossible to believe that Nicholas Bellinger didn't know that SCST is a lot more generic than LIO and has zero-copy in all the same places, where LIO has. Thus, that comparison page looked like rather a deliberate cheating attempt. Seems SCST is so much superior over LIO, so Nicholas Bellinger gave up technical discussions and started attacking people's perception about SCST, trying to inspire them the opposite.
So, for SCST there was no other way, except to setup own, correct comparison. This comparison table turned out to be very useful, so it was extended to cover all the SCSI target areas.