You could add the GVP A4060DT card to the list. Don't know how it compares speed-wise. I've heard the SCSI is not that good and tricky about non-FFS partitions/disks but some cards are available...
If all accelerators are clocked at the same speed I guess the main speed difference will come from the speed difference of the memory interface and introduced latency differences when accessing the main system. I've heard that of the Cyberstorms, the mk3 is the fastest, trailed by a very small percentage by the mk1. The mk2 being the slowest of the three.
I have not seen an Apollo 4060 for sale in quite some time.
