First I wanna say here is that the Beat The Denominator is the best Youtube channel providing information about these bitcoin proxies.
Initially, the corporate valuation would be pegged at the treasury valuation. This represent a solid discount if compared to Strategy, which trades at 2x the value.
Are you sure about that? I think that if someone buys at that price it will be institutional investors who will have already agreed to buy at that price for the launch. I doubt that the general public is going to have that opportunity and even less seeing how CEP stock has behaved recently, of which XXI will be a merge.

You talk about this yourself but it doesn't quite square that the stock is going up pre-merge with there not going to be premium on NAV at launch, especially for the general public.
21 Capital will have some advantage over Strategy:

I would not take this for granted, it seems to me more marketing than anything else and in this sense I would recommend watching Beat The Denominator's video about it.
MSTR vs. XXI (CEP): Is XXI Really Better than MSTR?