I would be inclined to agree with that.
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On the flipside, there are some that argue BB/RB are actually a variation of TB directly. The better than average white coverage, and better blue/red is their reasoning. Much like a Royal White (except spontaneous thrown, of course like any other TB.)
If there were more than one type of phenotype that looked the same (as in blue neos), I may be able to agree with that- however how many phenotypes really look the same so far in caridina?
well....you do have those TB that look like the avg pattern of cards, with the exception of the colored face, I guess...and I have seen lower grades of TB...