There is a significant difference between 'Don't model this prototype, this one's ours, you can have that one' and 'Just so you know, we're intending to develop this prototype'.
I'm not against competing models as a matter of principle. My point is that for an obscure prototype (side note, the idea that we're running out of prototypes is pretty laughable but nevermind) two companies releasing models of effectively the same quality at a very similar price point is not helpful. It may well depress the price of these vehicles, but it will harm the results of both models relative to their projected returns.
This isn't a class 37 we're talking about. Both Bachmann and Accurascale will cover running numbers and liveries the other does not, and they'll both sell thousands. These things?....I doubt it.