The information is not the same. This is a comprehensive list of all recordings. Onno's site had in addition to recordings the complete work list of each composer with dates.
An archive version is here:
http://archive.is/mHjLQYes I was also a member of Onno's group. Sorry that he had to shut it down. what was unique was the recordings that were posted there. Also, his updates on new recordings, etc.
I didn't know Onno personally, but I had the impression he was getting up there in age. However, it would be possible to migrate most if not all the downloads here and info about the composers here also.
