It’s a couple of years now since we had a flurry of activity around people sharing and discussing product comparisons (search on product features/comparisons if you want to look at the archives).
Since then we have published a set of supplier responses to the sector-wide specification (spring 2016) and this was updated in September 2016. As many Jisc and other resources link to the original blog post on this topic we have decided it is logical to keep adding updates at the bottom of that page. To see the original and updated supplier responses go to https://ema.jiscinvolve.org/wp/2016/02/24/supplier-responses-to-uk-he-ema-system-requirements/
As the products are continuing to evolve, your views on how well various combinations meet your needs are still of interest to others so please keep sharing. For those using Moodle and Turnitin the comparison on the UCL wiki is regularly updated https://wiki.ucl.ac.uk/display/MoodleResourceCentre/Comparing+Moodle+Assignment+and+Turnitin