The smith that wrote the post has quite a bit of experience. I don't think he was trying to belittle either product...rather, it appeared to me that he thought a lot of BOTH types...as long as they were both done PROPERLY.
I have to think that we won't know the whole story with all this until some of the Caspian and Essex and other well cast parts have been around longer.
The years of use and users actually giving feedback about how these products hold up in actual use in GUNS will tell the tale.
There's no doubt about the quality of the original design, but there's nothing wrong with trying new things within the limits of the design. We love these things because of so many different reasons but one of them has always been that they will run with practically any conglomeration of decent parts you can find, make, or locate on the battlefield...