I think NRG is getting heavily overrated after that LEV game because they only played on their defensive halves and we didnt actually see them getting tested on their weakpoints. I think this game is completely 50/50, I would personally favour C9 because of how well rounded they are as a team and how good their map pool is.
With NRG there are still obvious weaknesses, their attackside on Bind, Sunset and Corrode is basically non existent, they only win rounds based on ults or hero rounds and they still cant midround well. With C9 however, their attacksides look much better, we have seen so many good called rounds from mitch and net, I wouldnt be surprised igling is the deciding factor on this series and C9 come out on top.
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