I have not historically interpreted comparative discussions of different games to be advertising, so long as they don’t contain competitors’ materials, and are not intentioned as marketing.
Here’s the rule:
I don’t interpret this rule as having to pretend that no other games exist in the world, nor that we need to treat other game names like some E&P version of He-Who-Must-Not-Be-Named, where no other game can ever be referred to directly.
A thread that posted a direct advertisement or promotion, or that attempted to market to players or poach them would be over the line and considered spam.
For that, you need to go to Mystic Vision. 