What do you mean the real thing? Are you referring to, say, you want Fan Zhendong super ZLC which is $400 and you want SDC to duplicate it/
I have visited SDC's website. It is very interesting and very informative. But even on the site, he stated clearly, if you want two blades of the same thing, order them at the same time because he can use the same exact wood for both blades so they react the same way. SDC also stated that he keeps a log of all the blade he has hand made so later on if you want to duplicate the same blade, he will be able to do so using the same composition of woods. However, he will not guarantee that it will play exactly the same, 100% because a different patch of wood was used.
I imagine all the Butterfly blades are not the same in the same class. after all, if they are the same, then why does one blade weighs 92 g but another blade, the same model, might weigh 88 g.
I have not bought from SDC yet. But I have a feeling to buy from SDC only if you want your blade to be a work of art and be "unique." You cannot find it anywhere else.
If you want to experiment, SDC is probably not the best for you. Like for me, I can buy $30 or $40 per blade and buy 5 of them (the same model) to experiment and put different rubbers on them. SDC's price is very reasonable but I highly doubt I would want to buy 5 of them at the same time from SDC since what he makes is unique and there is no review of an unique blade.
If you want to duplicate an expensive butterfly blade, then you might want to order chinese knock-off brands. I do not see an issue with Chinese knock-off brand since a $400 butterfly blade has a certain combination of wood and carbon, so the Chinese brand can duplicate that all they want. at the end, they may play similar or they may play very differently.