This: " It you definitively say that one Sith was the most powerful then by definition any others that you create in the EU must be inferior so I doubt the continuity people make such absolutes about the powerfulness of the characters." doesn't remotely contradict / address anything about Malak vs Kun, lol.
I'd also love for you to post the questions to those answers too, so people can see what Chee's actually referring to. 👆
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Chee's liking of Cory's post is pretty direct. The user asks, "@HolocronKeeper Mr. Chee I was wondering if you could verify @HernCo opinion on who is more powerful between Malak and Kun?" by which Cory responds, "FWIW I'm still Team Malak!" which Chee then likes. Given the user is specifically asking Chee his thoughts, the like is as blatant of an endorsement as you can get. (https://twitter.com/Sheevysheev66/status/997236045132558338)