I do have various makes of older razors and one new production Revisor and they all shave about the same if honed up to the same standard. I prefer their aesthetics to most of the customs I have seen. The customs I have seen, for the most part, are too over the top for me aesthetically and given my experience with the variety of razors I shave with fail to see how a custom would shave significantly better. That is not a put down of the skill and craftsmanship that goes into making a custom nor of the users who prefer them. It is just my personal preference. OTH if someone were to give me a custom I would not be adverse to trying it out and I just might change my mind on them, you never know.
Bob