There is a simple ratio, usually given in pre-release packages
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The fact it turns into essentially a Blightsteel Colossus on the other side is so hilariously irrelevant in most games that it speaks to how powerful that front side actually is
And Nemesis of Reason isnt a win condition on its own, but it certainly does a good impression of Ulamog, the Ceaseless Hunger
Outside of that I personally leave these two on the bench more often than not
If an effect would put one or more counters on a permanent that you control, it puts twice that many of those counters on that permanent instead