The 0562CF was originally run in M390; when it got harder for ZT to source M390 they switched to CTS 204P, which is chemically identical to M390. Currently they have switched over to CPM 20CV which is also chemically identical.
As far as performance you won't notice any difference between the three. They are chemically the same, just made by different manufacturers. The M390 ones are hard to find these days. There are lots of 204P ones that tend to get listed on the exchange pretty regularly. If you buy one new from a dealer it will most likely be 20CV.